Datasheet SAA5551PS-M2A, SAA5552PS-M2A, SAA5553PS-M2A Datasheet (Philips)

DATA SH EET

Preliminary specification
File under Integrated Circuits, IC02

1999 Oct 27

INTEGRATED CIRCUITS

SAA55xx

Standard TV microcontrollers with
On-Screen Display (OSD)

1999 Oct 27 2

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

CONTENTS

1 FEATURES
2 GENERAL DESCRIPTION
3 QUICK REFERENCE DATA
4 ORDERING INFORMATION
5 BLOCK DIAGRAM
6 PINNING INFORMATION

6.1 Pinning

6.2 Pin description
7 MICROCONTROLLER

7.1 Microcontroller features
8 MEMORY ORGANISATION

8.1 Security bits - program and verify

8.2 RAM organisation

8.3 Data memory

8.4 SFR memory

8.5 Character set feature bits

8.6 External (auxiliary) memory
9 POWER-ON RESET
10 REDUCED POWER MODES

10.1 Idle mode

10.2 Power-down mode

10.3 Standby mode
11 I/O FACILITY

11.1 I/O ports

11.2 Port type

11.3 Port alternate functions

11.4 LED support
12 INTERRUPT SYSTEM

12.1 Interrupt enable structure

12.2 Interrupt enable priority

12.3 Interrupt vector address

12.4 Level/edge interrupt
13 TIMER/COUNTER
14 WATCHDOG TIMER

14.1 Watchdog Timer operation
15 PULSE WIDTH MODULATORS

15.1 PWM control

15.2 Tuning Pulse Width Modulator (TPWM)

15.3 Software ADC (SAD)
16 I2C-BUS SERIAL I/O

16.1 I2C-bus port selection
17 MEMORY INTERFACE

17.1 Memory structure

17.2 Memory mapping

17.3 Addressing memory

17.4 Page clearing
18 DATA CAPTURE

18.1 Data Capture Features

18.2 Broadcast service data detection

18.3 VPS acquisition

18.4 WSS acquisition
19 DISPLAY

19.1 Display features

19.2 Display mode

19.3 Display feature descriptions

19.4 Character and attribute coding

19.5 Screen and global controls

19.6 Screen colour

19.7 Text display control

19.8 Display positioning

19.9 Character set

19.10 Display synchronization

19.11 Video/data switch (fast blanking) polarity

19.12 Video/data switch adjustment

19.13 RGB brightness control

19.14 Contrast reduction
20 MEMORY MAPPED REGISTERS
21 LIMITING VALUES
22 CHARACTERISTICS

22.1 I2C-bus characteristics
23 QUALITY AND RELIABILITY

23.1 Group A

23.2 Group B

23.3 Group C
24 APPLICATION INFORMATION
25 ELECTROMAGNETIC COMPATIBILITY

(EMC) GUIDELINES
26 PACKAGE OUTLINE
27 SOLDERING

27.1 Introduction to soldering through-hole mount

packages

27.2 Soldering by dipping or by solder wave

27.3 Manual soldering

27.4 Suitability of through-hole mount IC packages

for dipping and wave soldering methods
28 DEFINITIONS
29 LIFE SUPPORT APPLICATIONS
30 PURCHASE OF PHILIPS I2C COMPONENTS

1999 Oct 27 3

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

1 FEATURES

• Single-chip microcontroller with integrated On-Screen
Display (OSD)

• Versions available with integrated data capture

• One Time Programmable (OTP) memory for both

program Read Only Memory (ROM) and character sets

• Single power supply: 3.0 to 3.6 V

• 5 V tolerant digital inputs and I/O

• 29 I/O lines via individual addressable controls

• Programmable I/O for push-pull, open-drain and

quasi-bidirectional

• Two port lines with 8 mA sink (at <0.4 V) capability, for
direct drive of Light Emitting Diode (LED)

• Single crystal oscillator for microcontroller, OSD and
data capture

• Power reduction modes: Idle and Power-down

• Byte level I2C-bus with dual port I/O

• Pin compatibility throughout family

• Operating temperature: −20 to +70 °C.

2 GENERAL DESCRIPTION

The SAA55xx standard family of microcontrollers are a
derivative of the Philips industry-standard 80C51
microcontroller, and are intended for use as the central
control mechanism in a television receiver. They provide
controlfunctionsforthetelevisionsystem,OSD,andsome
versions include an integrated data capture and display
function.

The data capture hardware has the capability of decoding
and displaying both 525 and 625-line World System
Teletext (WST), Video Programming System (VPS) and
Wide Screen Signalling (WSS) information. The same
displayhardwareisusedbothforTeletext and OSD, which
means that the display features available give greater
flexibility to differentiate the TV set.

The SAA55xx standard family offers a range of
functionality from non-text, 16-kbyte program ROM and
256-byte Random Access Memory (RAM), to a 10-page
text version, 64-kbyte program ROM and 1.2-kbyte RAM.

3 QUICK REFERENCE DATA

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

Supply

V

DDX

any supply voltage (VDDto VSS) 3.0 3.3 3.6 V

I

DDP

periphery supply current 1 −−mA

I

DDC

core supply current − 15 18 mA

I

DDC(id)

Idle mode core supply current − 4.6 6 mA

I

DDC(pd)

Power-down mode core supply current − 0.76 1 mA

I

DDC(stb)

Standby mode core supply current − 5.11 6.50 mA

I

DDA

analog supply current − 45 48 mA

I

DDA(id)

Idle mode analog supply current − 0.87 1.0 mA

I

DDA(pd)

Power-down mode analog supply current − 0.45 0.7 mA

I

DDA(stb)

Standby mode analog supply current − 0.95 1.20 mA

f

xtal

crystal frequency − 12 − MHz

T

amb

operating ambient temperature −20 − +70 °C

T

stg

storage temperature −55 − +125 °C

1999 Oct 27 4

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

4 ORDERING INFORMATION

Notes

1. ‘nnnn’ is a four digit number uniquely referencing the microcontroller program mask.

2. For details of the LQFP100 package, please contact your local regional office for availability.

TYPE NUMBER

(1)

PACKAGE

(2)

ROM RAM

TEXT

PAGES

NAME DESCRIPTION VERSION

SAA5500PS/nnnn SDIP52 plasticshrink dual in-line package;

52 leads (600 mil)

SOT247-1 16-kbyte 256-byte −
SAA5501PS/nnnn 32-kbyte 512-byte −
SAA5502PS/nnnn 48-kbyte 256-byte −
SAA5503PS/nnnn 64-kbyte 512-byte −
SAA5520PS/nnnn 16-kbyte 256-byte 1
SAA5521PS/nnnn 32-kbyte 512-byte 1
SAA5522PS/nnnn 48-kbyte 750-byte 1
SAA5523PS/nnnn 64-kbyte 1-kbyte 1
SAA5551PS/nnnn 32-kbyte 750-byte 10
SAA5552PS/nnnn 48-kbyte 1-kbyte 10
SAA5553PS/nnnn 64-kbyte 1.2-kbyte 10

1999 Oct 27 5

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

5 BLOCK DIAGRAM

Fig.1 Block diagram (top level architecture).

handbook, full pagewidth

GSA029

MICROPROCESSOR

(80C51)

SRAM

(256-BYTE)

ROM

(16 TO 64-KBYTE)

MEMORY

INTERFACE

DISPLAY

R
G
B
VDS

VSYNC
HSYNC

CVBS

DATA

CAPTURE

DRAM

(3 TO 12-KBYTE)

TV CONTROL

AND

INTERFACE

I

2

C-bus, general I/O

DISPLAY

TIMING

CVBS

DATA

CAPTURE

TIMING

1999 Oct 27 6

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

6 PINNING INFORMATION

6.1 Pinning

Fig.2 SDIP52 pin configuration.

handbook, halfpage

SAA55xx

MBK951

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

P2.0/TPWM
P2.1/PWM0
P2.2/PWM1
P2.3/PWM2
P2.4/PWM3
P2.5/PWM4
P2.6/PWM5
P2.7/PWM6

P3.0/ADC0
P3.1/ADC1
P3.2/ADC2
P3.3/ADC3

V

SSC
P0.0

P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7

V

SSA

CVBS0
CVBS1

SYNC_FILTER

IREF

P1.5/SDA1
P1.4/SCL1
P1.7/SDA0
P1.6/SCL0
P1.3/T1
P1.2/INT0
P1.1/T0
P1.0/INT1
V

DDP

RESET
XTALOUT
XTALIN
OSCGND
V

DDC

V

SSP

VSYNC
HSYNC
VDS
R
G
B
V

DDA

P3.4/PWM7
COR
VPE
FRAME

52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27

1999 Oct 27 7

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.3 LQFP100 pin configuration.

handbook, full pagewidth

75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
5125

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

P3.7

P0.4

n.c.

P0.3

n.c.

n.c.

n.c.

P0.2

P0.1

P0.0

n.c.

n.c.

P0.5

V

SSP

V

SSC

n.c.

n.c.

n.c.

n.c.

P3.3/ADC3

P3.2/ADC2

P3.1/ADC1

n.c.

P3.0/ADC0

P2.7/PWM6

n.c.

VDS

HSYNC

P3.5

VSYNC

n.c.

n.c.

n.c.

P3.6

V

SSP

n.c.

VPE_2

V

DDC

n.c.

n.c.

n.c.

n.c.

n.c.

OSCGND

XTALIN

XTALOUT

n.c.

RESET

n.c.

V

DDP

100

99989796959493929190898887868584838281

8079787776

P2.0/TPWM

n.c.

P2.6/PWM5

P2.5/PWM4

P2.4/PWM3

P2.3/PWM2

P2.2/PWM1

P2.1/PWM0

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

n.c.

P1.5/SDA1

P1.4/SCL1

P1.7/SDA0

P1.6/SCL0

P1.3/T1

P1.2/INT0

P1.1/T0

n.c.

P1.0/INT1

n.c.

n.c.

P0.6

P0.7

V

SSA

CVBS0

CVBS1

n.c.

SYNC_FILTER

IREF

n.c.

n.c.

n.c.

n.c.

n.c.

FRAME

VPE

COR

P3.4/PWM7

V

DDA

B

G

R

n.c.

n.c.

26272829303132333435363738394041424344

45

4647484950

GSA001

SAA55xx

1999 Oct 27 8

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

6.2 Pin description
Table 1 SDIP52 and LQFP100 packages

SYMBOL

PIN

TYPE DESCRIPTION

SDIP52 LQFP100

P2.0/TPWM 1 100 I/O Port 2. 8-bit programmable bidirectional port with

alternative functions.
P2.0/TPWM is the output for the 14-bit high precision

PWM and P2.1/PWM0 to P2.7/PWM6 are the outputs
for the 6-bit PWMs 0 to 6.

P2.1/PWM0 2 93 I/O
P2.2/PWM1 3 94 I/O
P2.3/PWM2 4 95 I/O
P2.4/PWM3 5 96 I/O
P2.5/PWM4 6 97 I/O
P2.6/PWM5 7 98 I/O
P2.7/PWM6 8 1 I/O
P3.0/ADC0 9 2 I/O Port 3. 8-bit programmable bidirectional port with

alternative functions.
P3.0/ADC0 to P3.3/ADC3 are the inputs for the

software ADC facility and P3.4/PWM7 is the output for
the 6-bit PWM7. P3.5 to P3.7 have no alternative
functions and are only available with the LQFP100
package.

P3.1/ADC1 10 4 I/O
P3.2/ADC2 11 5 I/O
P3.3/ADC3 12 6 I/O
P3.4/PWM7 30 44 I/O
P3.5 − 54 I/O
P3.6 − 59 I/O
P3.7 − 25 I/O
V

SSC

13 11 − core ground

P0.0 14 16 I/O Port 0. 8-bit programmable bidirectional port.

P0.5 and P0.6 have 8 mA current sinking capability for
direct drive of LEDs.

P0.1 15 17 I/O
P0.2 16 18 I/O
P0.3 17 22 I/O
P0.4 18 24 I/O
P0.5 19 13 I/O
P0.6 20 28 I/O
P0.7 21 29 I/O
V

SSA

22 30 − analog ground

CVBS0 23 31 I Composite video input. A positive-going 1 V

(peak-to-peak) input is required; connected via a
100 nF capacitor.

CVBS1 24 32 I

SYNC_FILTER 25 34 I CVBS sync filter input. This pin should be connected to

V

SSA

via a 100 nF capacitor.

IREF 26 35 I Reference current input for analog circuits, connected

to V

SSA

via a 24 kΩ resistor.

FRAME 27 41 O De-interlace output synchronized with the VSYNC

pulse to produce a non-interlaced display by
adjustment of the vertical deflection circuits.

VPE 28 42 I OTP programming voltage

1999 Oct 27 9

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

COR 29 43 O Open-drain, active LOW output which allows selective

contrast reduction of the TV picture to enhance a
mixed mode display.

V

DDA

31 45 − +3.3 V analog power supply
B 32 46 O Pixel rate output of the BLUE colour information.
G 33 47 O Pixel rate output of the GREEN colour information.
R 34 48 O Pixel rate output of the RED colour information.
VDS 35 52 O Video/data switch push-pull output for dot rate fast

blanking.

HSYNC 36 53 I Schmitt triggered input for a TTL-level version of the

horizontal sync pulse; the polarity of this pulse is
programmable by register bit TXT1.H POLARITY.

VSYNC 37 55 I Schmitt triggered input for a TTL-level version of the

vertical sync pulse; the polarity of this pulse is
programmable by register bit TXT1.V POLARITY.

V

SSP

38 12, 60 − periphery ground
V

DDC

39 63 − +3.3 V core power supply
OSCGND 40 69 − crystal oscillator ground
XTALIN 41 70 I 12 MHz crystal oscillator input
XTALOUT 42 71 O 12 MHz crystal oscillator output
RESET 43 73 I If the reset input is HIGH for at least 2 machine cycles

(24 oscillator periods) while the oscillator is running,
the device is reset; this pin should be connected to
V

DDP

via a capacitor.

V

DDP

44 75 − +3.3 V periphery power supply
P1.0/INT1 45 76 I/O Port 1. 8-bit programmable bidirectional port with

alternative functions.
P1.0/INT1 is external interrupt 1 which can be

triggered on the rising and falling edge of the pulse.
P1.1/T0 is the counter/Timer 0. P1.2/INT0 is external
interrupt 0. P1.3/T1 is the counter/Timer 1. P1.6/SCL0
is the serial clock input for the I

2

C-bus and P1.7/SDA0
is the serial data port for the I2C-bus. P1.4/SCL1 is the
serial clock input for the I2C-bus. P1.5/SDA1 is the
serial data port for the I2C-bus.

P1.1/T0 46 78 I/O
P1.2/INT0 47 79 I/O
P1.3/T1 48 80 I/O
P1.6/SCL0 49 81 I/O
P1.7/SDA0 50 82 I/O
P1.4/SCL1 51 83 I/O
P1.5/SDA1 52 84 I/O

VPE_2 − 62 I OTP programming voltage
n.c. − 3, 7 to 10,14, 15,

19 to 21, 23, 26, 27, 33,

36 to 40, 49 to 51,

56 to 58, 61, 64 to 68,

72, 74, 77, 85 to 92, 99

− not connected

SYMBOL

PIN

TYPE DESCRIPTION

SDIP52 LQFP100

1999 Oct 27 10

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

7 MICROCONTROLLER

The functionality of the microcontroller used on this device
is described here with reference to the industry standard
80C51 microcontroller. A full description of its functionality
can be found in

“Handbook IC20, 80C51-Based 8-bit

Microcontrollers”

.

7.1 Microcontroller features

• 80C51 microcontroller core standard instruction set and
timing

• 1 µs machine cycle

• Maximum 64K × 8-bit Program ROM

• Maximum of 1.2K × 8-bit Auxiliary RAM

• InterruptControllerforindividualenable/disable with two

level priority

• Two 16-bit Timer/Counter registers

• Watchdog Timer

• Auxiliary RAM page pointer

• 16-bit Data pointer

• Idle and Power-down modes

• 29 general I/O lines

• Eight 6-bit Pulse Width Modulator (PWM) outputs for

control of TV analog signals

• One 14-bit PWM for Voltage Synthesis Tuner (VST)
control

• 8-bit Analog-to-Digital Converter (ADC) with
4 multiplexed inputs

• 2 high current outputs for directly driving LEDs

• I2C-bus byte level bus interface with dual ports.

8 MEMORY ORGANIZATION

The device has the capability of a maximum of 64-kbyte
Program ROM and 1.2-kbyte Data RAM internally.

8.1 Security bits - program and verify

SAA55xx devices have a set of security bits allied with
each section of the device, i.e. Program ROM, Character
ROM and Packet 26 ROM. The security bits are used to
prevent the ROM from being overwritten once
programmed, and also the contents being verified once
programmed. The security bits are one-time
programmable and cannot be erased.

The SAA55xx memory and security bits are structured as
shown in Fig.4. The SAA55xx security bits are set as
shown in Fig.5 for production programmed devices and
are set as shown in Fig.6 for production blank devices.

8.2 RAM organisation

The internal Data RAM is organised into two areas, Data
memory and Special Function Registers (SFRs) as shown
in Fig.7.

8.3 Data memory

The Data memory is 256 × 8-bit and occupies the address
range 00H to FFH when using indirect addressing and
00H to 7FH when using direct addressing. The SFRs
occupy the address range 80H to FFH and are accessible
using direct addressing only.

The lower 128 bytes of Data memory are mapped as
shown in Fig.8.

The lowest 24 bytes are grouped into 4 banks of
8 registers, the next 16 bytes above the register banks
form a block of bit addressable memory space.

The upper 128 bytes are notallocated for any special area
or functions.

1999 Oct 27 11

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.4 Memory and security bit structures.

handbook, full pagewidth

GSA030

PROGRAM ROM

MEMORY

USER ROM PROGRAMMING

(ENABLE/DISABLE)

VERIFY

(ENABLE/DISABLE)

SECURITY BITS INTERACTION

USER ROM

(64K x 8-BIT)

CHARACTER ROM

USER ROM

(9K x 12-BIT)

PACKET 26 ROM

USER ROM
(4K x 8-BIT)

USER ROM PROGRAMMING

(ENABLE/DISABLE)

VERIFY

(ENABLE/DISABLE)

USER ROM PROGRAMMING

(ENABLE/DISABLE)

VERIFY

(ENABLE/DISABLE)

Fig.5 Security bits for production devices.

handbook, full pagewidth

MBK954

PROGRAM ROM

MEMORY

USER ROM PROGRAMMING

(ENABLE/DISABLE)

VERIFY

(ENABLE/DISABLE)

DISABLED ENABLED

DISABLED ENABLED

DISABLED ENABLED

SECURITY BITS SET

CHARACTER ROM

PACKET 26 ROM

1999 Oct 27 12

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.6 Security bits for production blank devices.

handbook, full pagewidth

MBK955

PROGRAM ROM

MEMORY

USER ROM PROGRAMMING

(ENABLE/DISABLE)

VERIFY

(ENABLE/DISABLE)

ENABLED ENABLED

ENABLED ENABLED

ENABLED ENABLED

SECURITY BITS SET

CHARACTER ROM

PACKET 26 ROM

Fig.7 Internal Data memory.

handbook, halfpage

MBK956

accessible
by indirect

addressing

only

DATA

MEMORY

FFH

upper 128 bytes

lower 128 bytes

80H

7FH

00H

SPECIAL

FUNCTION

REGISTERS

accessible

by direct

and indirect

addressing

accessible

by direct

addressing

only

1999 Oct 27 13

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.8 Lower 128 bytes of internal RAM.

handbook, halfpage

MGM677

R7

R0

07H

0

R7

R0

0FH

08H

R7

R0

17H

10H

R7

R0

1FH

18H

2FH

7FH

20H

30H

bit-addressable space

(bit addresses 00H to 7FH)

4 banks of 8 registers

(R0 to R7)

1999 Oct 27 14

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with

On-Screen Display (OSD)

SAA55xx

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8.4 SFR memory

The Special Function Register (SFR) space is used for port latches, timer, peripheral control, acquisition control, display control. These registers can
only be accessed by direct addressing. Sixteen of the addresses in the SFR space are both bit and byte addressable. The bit addressable SFRs are
those whose address ends in 0H or 8H. A summary of the SFR map in address order is shown in Table 2.

A description of each of the SFR bits is shown in Table 3 which presents the SFRs in alphabetical order.

Table 2 SFR memory map

ADD R/W NAMES 7 6 5 4 3 2 1 0 RESET

80H R/W P0 P07 P06 P05 P04 P03 P02 P01 P00 FFH
81H R/W SP SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0 07H
82H R/W DPL DPL7 DPL6 DPL5 DPL4 DPL3 DPL2 DPL1 DPL0 00H
83H R/W DPH DPH7 DPH6 DPH5 DPH4 DPH3 DPH2 DPH1 DPH0 00H
87H R/W PCON 0 ARD RFI WLE GF1 GF0 PD IDL 00H
88H R/W TCON TF1 TR1 TF0 TR0 IE1 IT1 IE0 IT0 00H
89H R/W TMOD GATE C/

TM1 M0GATEC/T M1 M0 00H
8AH R/W TL0 TL07 TL06 TL05 TL04 TL03 TL02 TL01 TL00 00H
8BH R/W TL1 TL17 TL16 TL15 TL14 TL13 TL12 TL11 TL10 00H
8CH R/W TH0 TH07 TH06 TH05 TH04 TH03 TH02 TH01 TH00 00H
8DH R/W TH1 TH17 TH16 TH15 TH14 TH13 TH12 TH11 TH10 00H
90H R/W P1 P17 P16 P15 P14 P13 P12 P11 P10 FFH
96H R/W P0CFGA P0CFGA7 P0CFGA6 P0CFGA5 P0CFGA4 P0CFGA3 P0CFGA2 P0CFGA1 P0CFGA0 FFH
97H R/W P0CFGB P0CFGB7 P0CFGB6 P0CFGB5 P0CFGB4 P0CFGB3 P0CFGB2 P0CFGB1 P0CFGB0 00H
98H R/W SADB 0 0 0 DC_COMP SAD3 SAD2 SAD1 SAD0 00H
9EH R/W P1CFGA P1CFGA7 P1CFGA6 P1CFGA5 P1CFGA4 P1CFGA3 P1CFGA2 P1CFGA1 P1CFGA0 FFH
9FH R/W P1CFGB P1CFGB7 P1CFGB6 P1CFGB5 P1CFGB4 P1CFGB3 P1CFGB2 P1CFGB1 P1CFGB0 00H
A0H R/W P2 P27 P26 P25 P24 P23 P22 P21 P20 FFH
A6H R/W P2CFGA P2CFGA7 P2CFGA6 P2CFGA5 P2CFGA4 P2CFGA3 P2CFGA2 P2CFGA1 P2CFGA0 FFH
A7H R/W P2CFGB P2CFGB7 P2CFGB6 P2CFGB5 P2CFGB4 P2CFGB3 P2CFGB2 P2CFGB1 P2CFGB0 00H
A8H R/W IE EA EBUSY ES2 − ET1 EX1 ET0 EX0 00H
B0H R/W P3 P37 P36 P35 P34 P33 P32 P31 P30 FFH
B2H R/W TXT18 NOT3 NOT2 NOT1 NOT0 0 0 BS1 BS0 00H
B3H R/W TXT19 TEN TC2 TC1 TC0 0 0 TS1 TS0 00H
B4H R/W TXT20 0 0 0 0 OSD LANG

ENABLE

OSD LAN2 OSD LAN1 OSD LAN0 00H

1999 Oct 27 15

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with

On-Screen Display (OSD)

SAA55xx

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B5H R/W TXT21 0 0 0 0 I

2

C PORT 1 0 I2C PORT 0 0 02H
B6H R TXT22 GPF7 GPF6 0 GPF4 GPF3 0 GPF1 GPF0 XXH
B8H R/W IP 0 PBUSY PES2 PCC PT1 PX1 PT0 PX0 00H
B9H R/W TXT17 0 FORCE

ACQ1

FORCE

ACQ0

FORCE

DISP1

FORCE

DISP0

SCREEN

COL2

SCREEN

COL1

SCREEN

COL0

00H

BAH R WSS1 0 0 0 WSS<3:0>

ERROR

WSS3 WSS2 WSS1 WSS0 00H

BBH R WSS2 0 0 0 WSS<7:4>

ERROR

WSS7 WSS6 WSS5 WSS4 00H

BCH R WSS3 WSS<13:11>

ERROR

WSS13 WSS12 WSS11 WSS<10:8>

ERROR

WSS10 WSS9 WSS8 00H

BEH R/W P3CFGA 1 1 1 P3CFGA4 P3CFGA3 P3CFGA2 P3CFGA1 P3CFGA0 FFH
BFH R/W P3CFGB 0 0 0 P3CFGB4 P3CFGB3 P3CFGB2 P3CFGB1 P3CFGB0 00H
C0H R/W TXT0 X24 POSN DISPLAY

X24

AUTO

FRAME

DISABLE
HEADER

ROLL

DISPLAY

STATUS

ROW ONLY

DISABLE

FRAME

VPS ON INV ON 00H

C1H R/W TXT1 EXT PKT

OFF

8-BIT ACQ OFF X26 OFF FULL FIELD FIELD

POLARITYHPOLARITYVPOLARITY

00H

C2H R/W TXT2 ACQ BANK REQ3 REQ2 REQ1 REQ0 SC2 SC1 SC0 00H
C3H W TXT3 −− −PRD4 PRD3 PRD2 PRD1 PRD0 00H
C4H R/W TXT4 OSD BANK

ENABLE

QUAD

WIDTH

ENABLE

EAST/

WEST DISABLE

DOUBLE

HEIGHT

B MESH

ENABLE

C MESH
ENABLE

TRANS

ENABLE

SHADOW

ENABLE

00H

C5H R/W TXT5 BKGND OUT BKGND IN

COR OUT COR IN TEXT OUT TEXT IN PICTURE

ON OUT

PICTURE

ON IN

03H

C6H R/W TXT6 BKGND OUT BKGND IN

COR OUT COR IN TEXT OUT TEXT IN PICTURE

ON OUT

PICTURE

ON IN

03H

C7H R/W TXT7 STATUS

ROW TOP

CURSORONREVEAL BOTTOM

/

TOP

DOUBLE

HEIGHT

BOX ON 24 BOX ON

1 − 23

BOX ON 0 00H

C8H R/W TXT8 (reserved)

0

FLICKER

STOP ON

(reserved)0DISABLE

SPANISH

PKT 26

RECEIVED

WSS

RECEIVED

WSS ON CVBS1/

CVBS0

00H

C9H R/W TXT9 CURSOR

FREEZE

CLEAR

MEMORY

A0 R4 R3 R2 R1 R0 00H

CAH R/W TXT10 0 0 C5 C4 C3 C2 C1 C0 00H
CBH R/W TXT11 D7 D6 D5 D4 D3 D2 D1 D0 00H

ADD R/W NAMES 7 6 5 4 3 2 1 0 RESET

1999 Oct 27 16

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with

On-Screen Display (OSD)

SAA55xx

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CCH R TXT12 525/

625

SYNC

SPANISH ROM VER3 ROM VER2 ROM VER1 ROM VER0 1 VIDEO

SIGNAL

QUALITY

XXXX
XX1X

CDH R/W TXT14 0 0 0 − PAGE3 PAGE2 PAGE1 PAGE0 00H
CEH R/W TXT15 0 0 0 − BLOCK3 BLOCK2 BLOCK1 BLOCK0 00H
D0H R/W PSW C AC F0 RS1 RS0 OV − P 00H
D2H R/W TDACL TD7 TD6 TD5 TD4 TD3 TD2 TD1 TD0 00H
D3H R/W TDACH TPWE 1 TD13 TD12 TD11 TD10 TD9 TD8 40H
D4H R/W PWM7 PW7E 1 PW7V5 PW7V4 PW7V3 PW7V2 PW7V1 PW7V0 40H
D5H R/W PWM0 PW0E 1 PW0V5 PW0V4 PW0V3 PW0V2 PW0V1 PW0V0 40H
D6H R/W PWM1 PW1E 1 PW1V5 PW1V4 PW1V3 PW1V2 PW1V1 PW1V0 40H
D8H R/W S1CON CR2 ENSI STA STO SI AA CR1 CR0 00H
D9H R S1STA STAT4 STAT3 STAT2 STAT1 STAT0 0 0 0 F8H
DAH R/W S1DAT DAT7 DAT6 DAT5 DAT4 DAT3 DAT2 DAT1 DAT0 00H
DBH R/W S1ADR ADR6 ADR5 ADR4 ADR3 ADR2 ADR1 ADR0 GC 00H
DCH R/W PWM3 PW3E 1 PW3V5 PW3V4 PW3V3 PW3V2 PW3V1 PW3V0 40H
DDH R/W PWM4 PW4E 1 PW4V5 PW4V4 PW4V3 PW4V2 PW4V1 PW4V0 40H
DEH R/W PWM5 PW5E 1 PW5V5 PW5V4 PW5V3 PW5V2 PW5V1 PW5V0 40H
DFH R/W PWM6 PW6E 1 PW6V5 PW6V4 PW6V3 PW6V2 PW6V1 PW6V0 40H
E0H R/W ACC ACC7 ACC6 ACC5 ACC4 ACC3 ACC2 ACC1 ACC0 00H
E4H R/W PWM2 PW2E 1 PW2V5 PW2V4 PW2V3 PW2V2 PW2V1 PW2V0 40H
E8H R/W SAD VHI CH1 CH0 ST SAD7 SAD6 SAD5 SAD4 00H
F0H R/W B B7 B6 B5 B4 B3 B2 B1 B0 00H
F8H R/W TXT13 VPS

RECEIVED

PAGE

CLEARING

525 DISPLAY 525 TEXT 625 TEXT PKT 8/30 FASTEXT 0 XXXX

XXX0
FAH R/W XRAMP XRAMP7 XRAMP6 XRAMP5 XRAMP4 XRAMP3 XRAMP2 XRAMP1 XRAMP0 00H
FBH R/W ROMBK STANDBY 0 0 0 0 0 (reserved)0(reserved)000H

FEH W WDTKEY WKEY7 WKEY6 WKEY5 WKEY4 WKEY3 WKEY2 WKEY1 WKEY0 00H
FFH R/W WDT WDV7 WDV6 WDV5 WDV4 WDV3 WDV2 WDV1 WDV0 00H

ADD R/W NAMES 7 6 5 4 3 2 1 0 RESET

1999 Oct 27 17

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Table 3 SFR bit description

BIT FUNCTION

Accumulator (ACC)

ACC7 to ACC0 accumulator value

B Register (B)

B7 to B0 B register value

Data Pointer High byte (DPH)

DPH7 to DPH0 data pointer high byte, used with DPL to address auxiliary memory

Data Pointer Low byte (DPL)

DPL7 to DPL0 data pointer low byte, used with DPH to address auxiliary memory

Interrupt Enable Register (IE)

EA disable all interrupts (logic 0), or use individual interrupt enable bits (logic 1)
EBUSY enable BUSY interrupt
ES2 enable I

2

C-bus interrupt
ET1 enable Timer 1 interrupt
EX1 enable external interrupt 1
ET0 enable Timer 0 interrupt
EX0 enable external interrupt 0

Interrupt Priority Register (IP)

PBUSY priority EBUSY interrupt
PES2 priority ES2 interrupt
PCC priority ECC interrupt
PT1 priority Timer 1 interrupt
PX1 priority external interrupt 1
PT0 priority Timer 0 interrupt
PX0 priority external interrupt 0

Port 0 (P0)

P07 to P00 Port 0 I/O register connected to external pins

Port 1 (P1)

P17 to P10 Port 1 I/O register connected to external pins

Port 2 (P2)

P27 to P20 Port 2 I/O register connected to external pins

Port 3 (P3)

P37 to P30 Port 3 I/O register connected to external pins; P37 to P35 are only available with

the LQFP100 package

1999 Oct 27 18

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Port 0 Configuration A (P0CFGA) and Port 0 Configuration B (P0CFGB)

P0CFGA<7:0> and P0CFGB<7:0> These two registers are used to configure Port 0 pins. For example, the

configuration of Port 0 pin 3 is controlled by setting bit 3 in both P0CFGA and
P0CFGB. P0CFGB<x>/P0CFGA<x>:

00 = P0.x in open-drain configuration
01 = P0.x in quasi-bidirectional configuration
10 = P0.x in high-impedance configuration
11 = P0.x in push-pull configuration

Port 1 Configuration A (P1CFGA) and Port 1 Configuration B (P1CFGB)

P1CFGA<7:0> and P1CFGB<7:0> These two registers are used to configure Port 1 pins. For example, the

configuration of Port 1 pin 3 is controlled by setting bit 3 in both P1CFGA and
P1CFGB. P1CFGB<x>/P1CFGA<x>:

00 = P1.x in open-drain configuration
01 = P1.x in quasi-bidirectional configuration
10 = P1.x in high-impedance configuration
11 = P1.x in push-pull configuration

Port 2 Configuration A (P2CFGA) and Port 2 Configuration B (P2CFGB)

P2CFGA<7:0> and P2CFGB<7:0> These two registers are used to configure Port 2 pins. For example, the

configuration of Port 2 pin 3 is controlled by setting bit 3 in both P2CFGA and
P2CFGB. P2CFGB<x>/P2CFGA<x>:

00 = P2.x in open-drain configuration
01 = P2.x in quasi-bidirectional configuration
10 = P2.x in high-impedance configuration
11 = P2.x in push-pull configuration

Port 3 Configuration A (P3CFGA) and Port 3 Configuration B (P3CFGB)

P3CFGA<7:0> and P3CFGB<7:0> These two registers are used to configure Port 3 pins. For example, the

configuration of Port 3 pin 3 is controlled by setting bit 3 in both P3CFGA and
P3CFGB. P3CFGB<x>/P3CFGA<x>:

00 = P3.x in open-drain configuration
01 = P3.x in quasi-bidirectional configuration
10 = P3.x in high-impedance configuration
11 = P3.x in push-pull configuration

BIT FUNCTION

1999 Oct 27 19

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Power Control Register (PCON)

ARD auxiliary RAM disable bit, all MOVX instructions access the external data

memory
RFI disable ALE during internal access to reduce radio frequency interference
WLE Watchdog Timer enable
GF1 general purpose flag 1
GF0 general purpose flag 0
PD Power-down mode activation bit
IDL Idle mode activation bit

Program Status Word (PSW)

C carry bit
AC auxiliary carry bit
F0 flag 0
RS1 to RS0 register bank selector bits RS<1:0>:

00 = Bank 0 (00H to 07H)
01 = Bank 1 (08H to 0FH)
10 = Bank 2 (10H to 17H)

11 = Bank 3 (18H to 1FH)
OV overflow flag
P parity bit

Pulse Width Modulator 0 Control Register (PWM0)

PW0E activate this PWM and take control of respective port pin (logic 1)
PW0V5 to PW0V0 pulse width modulator high time

Pulse Width Modulator 1 Control Register (PWM1)

PW1E activate this PWM (logic 1)
PW1V5 to PW1V0 pulse width modulator high time

Pulse Width Modulator 2 Control Register (PWM2)

PW2E activate this PWM (logic 1)
PW2V5 to PW2V0 pulse width modulator high time

Pulse Width Modulator 3 Control Register (PWM3)

PW3E activate this PWM (logic 1)
PW3V5 to PW3V0 pulse width modulator high time

Pulse Width Modulator 4 Control Register (PWM4)

PW4E activate this PWM (logic 1)
PW4V5 to PW4V0 pulse width modulator high time

BIT FUNCTION

1999 Oct 27 20

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Pulse Width Modulator 5 Control Register (PWM5)

PW5E activate this PWM (logic 1)
PW5V5 to PW5V0 pulse width modulator high time

Pulse Width Modulator 6 Control Register (PWM6)

PW6E activate this PWM (logic 1)
PW6V5 to PW6V0 pulse width modulator high time

Pulse Width Modulator 7 Control Register (PWM7)

PW7E activate this PWM (logic 1)
PW7V5 to PW7V0 pulse width modulator high time

ROM Bank (ROMBK)

STANDBY standby activation bit

I

2

C-bus Slave Address Register (S1ADR)

ADR6 to ADR0 I

2

C-bus slave address to which the device will respond

GC enable I

2

C-bus general call address (logic 1)

I

2

C-bus Control Register (S1CON)

CR2 to CR0 clock rate bits; CR<2:0>:

000 = 100 kHz bit rate

001 = 3.75 kHz bit rate

010 = 150 kHz bit rate

011 = 200 kHz bit rate

100 = 25 kHz bit rate

101 = 1.875 kHz bit rate

110 = 37.5 kHz bit rate

111 = 50 kHz bit rate
ENSI enable I

2

C-bus interface (logic 1)

STA START flag. When this bit is set in slave mode, the hardware checks the I

2

C-bus
and generates a START condition if the bus is free or after the bus becomes free.
If the device operates in master mode it will generate a repeated START
condition.

STO STOP flag. If this bit is set in a master mode a STOP condition is generated. A

STOP condition detected on the I

2

C-bus clears this bit. This bit may also be set
in slave mode in order to recover from an error condition. In this case no STOP
condition is generated to the I2C-bus, but the hardware releases the SDA and
SCL lines and switches to the not selected receiver mode. The STOP flag is
cleared by the hardware.

BIT FUNCTION

1999 Oct 27 21

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

SI Serial Interrupt flag. This flag is set and an interrupt request is generated, after

any of the following events occur:

• A START condition is generated in master mode

• The own slave address has been received during AA = 1

• The general call address has been received while S1ADR.GC and AA = 1

• Adatabytehasbeenreceivedortransmittedinmastermode(evenifarbitration

is lost)

• A data byte has been received or transmitted as selected slave

• A STOP or START condition is received as selected slave receiver or

transmitter.While the SI flag is set, SCL remains LOW and the serial transferis
suspended. SI must be reset by software.

AA Assert Acknowledge flag. When this bit is set, an acknowledge is returned

after any one of the following conditions:

• Own slave address is received

• General call address is received (S1ADR.GC = 1)

• A data byte is received, while the device is programmed to be a master receiver

• A data byte is received, while the device is selected slave receiver.

When the bit is reset, no acknowledge is returned. Consequently, no interrupt is
requested when the own address or general call address is received.

I

2

C-bus Data Register (S1DAT)

DAT7 to DAT0 I

2

C-bus data

I

2

C-bus Status Register (S1STA)

STAT4 to STAT0 I

2

C-bus interface status

Software ADC Register (SAD)

VHI analog input voltage greater than DAC voltage (logic 1)
CH1 to CH0 ADC input channel select bits; CH<1:0>:

00 = ADC3
01 = ADC0
10 = ADC1
11 = ADC2

ST

(1)

initiate voltage comparison between ADC input channel and SAD value

SAD7 to SAD4 4 MSBs of DAC input word

Software ADC Control Register (SADB)

DC_COMP enable DC comparator mode (logic 1)
SAD3 to SAD0 4 LSBs of SAD value

Stack Pointer (SP)

SP7 to SP0 stack pointer value

BIT FUNCTION

1999 Oct 27 22

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Timer/Counter Control Register (TCON)

TF1 Timer 1 overflow flag. Set by hardware on timer/counter overflow. Cleared by

hardware when processor vectors to interrupt routine.

TR1 Timer 1 run control bit. Set/cleared by software to turn timer/counter on/off.
TF0 Timer 0 overflow flag. Set by hardware on timer/counter overflow. Cleared by

hardware when processor vectors to interrupt routine.

TR0 Timer 0 run control bit. Set/cleared by software to turn timer/counter on/off.
IE1 Interrupt 1 Edge flag. Both edges generate flag. Set by hardware when external

interrupt edge detected. Cleared by hardware when interrupt processed.

IT1 Interrupt 1 type control bit. Set/cleared by software to specify edge/LOW level

triggered external interrupts.

IE0 Interrupt 0 Edge l flag. Set by hardware when external interrupt edge detected.

Cleared by hardware when interrupt processed.

IT0 Interrupt 0 type flag. Set/cleared by software to specify falling edge/LOW level

triggered external interrupts.

14-bit PWM MSB Register (TDACH)

TPWE activate this 14-bit PWM (logic 1)
TD13 to TD8 6 MSBs of 14-bit number to be output by the 14-bit PWM

14-bit PWM LSB Register (TDACL)

TD7 to TD0 8 LSBs of 14-bit number to be output by the 14-bit PWM

Timer 0 High byte (TH0)

TH07 to TH00 8 MSBs of Timer 0 16-bit counter

Timer 1 High byte (TH1)

TH17 to TH10 8 MSBs of Timer 1 16-bit counter

Timer 0 Low byte (TL0)

TL07 to TL00 8 LSBs of Timer 0 16-bit counter

Timer 1 Low byte (TL1)

TL17 to TL10 8 LSBs of Timer 1 16-bit counter

Timer/Counter Mode Control (TMOD)

GATE gating control Timer/Counter 1
C/

T Counter/Timer 1 selector

M1 to M0 mode control bits timer/counter 1; M<1:0>:

00 = 8-bit timer or 8-bit counter with divide-by-32 prescaler
01 = 16-bit time interval or event counter
10 = 8-bit time interval or event counter with automatic reload upon overflow;

reload value stored in TH1

11 = stopped
GATE Gating control Timer/Counter 0
C/

T Counter/Timer 0 selector

BIT FUNCTION

1999 Oct 27 23

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

M1 to M0 mode control bits timer/counter 0; M<1:0>:

00 = 8-bit timer or 8-bit counter with divide-by-32 prescaler

01 = 16-bit time interval or event counter

10 = 8-bit time interval or event counter with automatic reload upon overflow;

reload value stored in TH0

11 = one 8-bit time interval or event counter and one 8-bit time interval counter

Text Register 0 (TXT0)

X24 POSN store packet 24 in extension packet memory (logic 0) or page memory (logic 1)
DISPLAY X24 display X24 from page memory (logic 0) or extension packet memory (logic 1)
AUTO FRAME FRAME output switched off automatically if any video displayed (logic 1)
DISABLE HEADER ROLL disable writing of rolling headers and time into memory (logic 1)
DISPLAY STATUS ROW ONLY display row 24 only (logic 1)
DISABLE FRAME FRAME output always LOW (logic 1)
VPS ON enable capture of VPS data (logic 1)
INV ON enable capture of inventory page in block 8 (logic 1)

Text Register 1 (TXT1)

EXT PKT OFF disable acquisition of extension packets (logic 1)
8-BIT disable checking of packets 0 to 24 written into memory (logic 1)
ACQ OFF disable writing of data into Display memory (logic 1)
X26 OFF disable automatic processing of X/26 data (logic 1)
FULL FIELD acquire data on any TV line (logic 1)
FIELD POLARITY VSYNC pulse in second half of line during even field (logic 1)
H POLARITY HSYNC reference edge is negative going (logic 1)
V POLARITY VSYNC reference edge is negative going (logic 1)

Text Register 2 (TXT2)

ACQ BANK select acquisition Bank 1 (logic 1)
REQ3 to REQ0 page request
SC2 to SC0 start column of page request

Text Register 3 (TXT3)

PRD4 to PRD0 page request data

Text Register 4 (TXT4)

OSD BANK ENABLE alternate OSD location available via graphic attribute, additional 32 locations

(logic 1)
QUAD WIDTH ENABLE enable display of quadruple width characters (logic 1)
EAST/

WEST eastern language selection of character codes A0H to FFH (logic 1)
DISABLE DOUBLE HEIGHT disable normal decoding of double height characters (logic 1)
B MESH ENABLE enable meshing of black background (logic 1)
C MESH ENABLE enable meshing of coloured background (logic 1)
TRANS ENABLE display black background as video (logic 1)
SHADOW ENABLE display shadow/fringe (default SE black) (logic 1)

BIT FUNCTION

1999 Oct 27 24

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Text Register 5 (TXT5)

BKGND OUT background colour displayed outside teletext boxes (logic 1)
BKGND IN background colour displayed inside teletext boxes (logic 1)
COR OUT COR active outside teletext and OSD boxes (logic 1)
COR IN COR active inside teletext and OSD boxes (logic 1)
TEXT OUT text displayed outside teletext boxes (logic 1)
TEXT IN text displayed inside teletext boxes (logic 1)
PICTURE ON OUT video displayed outside teletext boxes (logic 1)
PICTURE ON IN video displayed inside teletext boxes (logic 1)

Text Register 6 (TXT6)

BKGND OUT background colour displayed outside teletext boxes (logic 1)
BKGND IN background colour displayed inside teletext boxes (logic 1)
COR OUT COR active outside teletext and OSD boxes (logic 1)
COR IN COR active inside teletext and OSD boxes (logic 1)
TEXT OUT text displayed outside teletext boxes (logic 1)
TEXT IN text displayed inside teletext boxes (logic 1)
PICTURE ON OUT video displayed outside teletext boxes (logic 1)
PICTURE ON IN video displayed inside teletext boxes (logic 1)

Text Register 7 (TXT7)

STATUS ROW TOP display memory row 24 information above teletext page (on display row 0)

(logic 1)
CURSOR ON display cursor at position given by TXT9 and TXT10 (logic 1)
REVEAL display characters in area with conceal attribute set (logic 1)
BOTTOM/

TOP display memory rows 12 to 23 when DOUBLE HEIGHT height bit is set (logic 1)
DOUBLE HEIGHT display each character as twice normal height (logic 1)
BOX ON 24 enable display of teletext boxes in memory row 24 (logic 1)
BOX ON 1 to 23 enable display of teletext boxes in memory row 1 to 23 (logic 1)
BOX ON 0 enable display of teletext boxes in memory row 0 (logic 1)

Text Register 8 (TXT8)

FLICKER STOP ON disable ‘Flicker Stopper’ circuitry (logic 1)
DISABLE SPANISH disable special treatment of Spanish packet 26 characters (logic 1)
PKT 26 RECEIVED

(2)

packet 26 data has been processed (logic 1)

WSS RECEIVED

(2)

WSS data has been processed (logic 1)
WSS ON enable acquisition of WSS data (logic 1)
CVBS1/

CVBS0 select CVBS1 as source for device (logic 1)

BIT FUNCTION

1999 Oct 27 25

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Text Register 9 (TXT9)

CURSOR FREEZE lock cursor at current position (logic 1)
CLEAR MEMORY

(1)

clear memory block pointed to by TXT15 (logic 1)
A0 access extension packet memory (logic 1)
R4 to R0

(3)

current memory row value

Text Register 10 (TXT10)

C5 to C0

(4)

current memory column value

Text Register 11 (TXT11)

D7 to D0 data value written or read from memory location defined by TXT9, TXT10 and

TXT15

Text Register 12 (TXT12)

625/525 SYNC 525-line CVBS signal is being received (logic 1)
SPANISH Spanish character set present (logic 1)
ROM VER3 to ROM VER0 mask programmable identification for character set
VIDEO SIGNAL QUALITY acquisition can be synchronized to CVBS (logic 1)

Text Register 13 (TXT13)

VPS RECEIVED VPS data (logic 1)
PAGE CLEARING software or power-on page clear in progress (logic 1)
525 DISPLAY 525-line synchronisation for display (logic 1)
525 TEXT 525-line WST being received (logic 1)
625 TEXT 625-line WST being received (logic 1)
PKT 8/30 packet 8/30/x(625) or packet 4/30/x(525) data detected (logic 1)
FASTEXT packet x/27 data detected (logic 1)

Text Register 14 (TXT14)

PAGE3 to PAGE0 current display page

Text Register 15 (TXT15)

BLOCK3 to BLOCK0 current micro block to be accessed by TXT9, TXT10 and TXT11

Text Register 17 (TXT17)

FORCE ACQ1 to FORCE ACQ0 FORCE ACQ<1:0>:

00 = automatic selection
01 = force 525 timing, force 525 teletext standard
10 = force 625 timing, force 625 teletext standard
11 = force 625 timing, force 525 teletext standard

FORCE DISP1 to FORCE DISP0 FORCE DISP<1:0>:

00 = automatic selection
01 = force display to 525 mode (9 lines per row)
10 = force display to 625 mode (10 lines per row)
11 = not valid (default to 625 mode)

BIT FUNCTION

1999 Oct 27 26

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

SCREEN COL2 to SCREEN COL0 Defines colour to be displayedinstead of TV picture and blackbackground; these

bits are equivalent to the RGB components. SCREEN COL<2:0>:

000 = transparent
001 = CLUT entry 9
010 = CLUT entry 10
011 = CLUT entry 11
100 = CLUT entry 12
101 = CLUT entry 13
110 = CLUT entry 14
111 = CLUT entry 15

Text Register 18 (TXT18)

NOT3 to NOT0 national option table selection, maximum of 31 when used with EAST/

WEST bit

BS1 to BS0 basic character set selection

Text Register 19 (TXT19)

TEN enable twist character set (logic 1)
TC2 to TC0 language control bits (C12, C13 and C14) that has twisted character set
TS1 to TS0 twist character set selection

Text Register 20 (TXT20)

OSD LANG ENABLE enable use of OSD LAN<2:0> to define language option for display, instead of

C12, C13 and C14
OSD LAN2 to OSD LAN0 alternative C12, C13 and C14 bits for use with OSD menus

Text Register 21 (TXT21)

I

2

C PORT 1 enable I2C-bus Port 1 selection (P1.5/SDA1 and P1.4/SCL1) (logic 1)

I

2

C PORT 0 enable I2C-bus Port 0 selection (P1.7/SDA0 and P1.6/SCL0) (logic 1)

Text Register 22 (TXT22)

GPF7 to GPF6 reserved
GPF5 standard device (logic 0)
GPF4 10 pages available (logic 1)
GPF3 PWM0, PWM1, PWM2 and PWM3 outputs routed to Port 2.1 to Port 2.4

respectively (logic 1)
GPF2 reserved
GPF1 text acquisition available (logic 1)
GPF0 reserved

Watchdog Timer (WDT)

WDV7to WDV0 Watchdog Timer period

BIT FUNCTION

1999 Oct 27 27

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Notes

1. This flag is set by software and reset by hardware.

2. This flag is set by hardware and must be reset by software.

3. Valid range TXT mode 0 to 24.

4. Valid range TXT mode 0 to 39.

5. Must be set to 55H to disable Watchdog Timer when active.

Watchdog Timer Key (WDTKEY)

WKEY7 to WKEY0

(5)

Watchdog Timer Key

Wide Screen Signalling 1 (WSS1)

WSS<3:0> ERROR error in WSS<3:0> (logic 1)
WSS3 to WSS0 signalling bits to define aspect ratio (group 1)

Wide Screen Signalling 2 (WSS2)

WSS<7:4> ERROR error in WSS<7:4> (logic 1)
WSS7 to WSS4 signalling bits to define enhanced services (group 2)

Wide Screen Signalling 3 (WSS3)

WSS<13:11> ERROR error in WSS<13:11> (logic 1)
WSS13 to WSS11 signalling bits to define reserved elements (group 4)
WSS<10:8> ERROR error in WSS<10:8> (logic 1)
WSS10 to WSS8 signalling bits to define subtitles (group 3)

XRAMP

XRAMP7 to XRAMP0 internal RAM access upper byte address

BIT FUNCTION

1999 Oct 27 28

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

8.5 Character set feature bits

Features available on the SAA55xx devices are reflected in a specific area of the character ROM. These sections of the
character ROM are mapped to two Special Function Registers: TXT22 and TXT12. Character ROM address 09FEH is
mapped to SFR TXT22 as shown in Table 4. Character ROM address 09FFH is mapped to SFR TXT12 as shown in
Table 6.

Table 4 Character ROM - TXT22 mapping
U = used; X = reserved

Table 5 Description of Character ROM address 09FEH bits

Table 6 Character ROM - TXT12 mapping

U = used; X = reserved

Table 7 Description of Character ROM address 09FFH bits

MAPPED ITEMS 11 10 9 8 7 6 5 4 3 2 1 0

Character ROM
address 09FEH

XXXXXXUUUXUX

Mapped to TXT22 −−−−76543210

BIT NUMBER FUNCTION

0 reserved; normally set to logic 1
1 1 = Text Acquisition available

0 = Text Acquisition not available
2 reserved
3 1 = PWM0, PWM1, PWM2 and PWM3 output routed to Port 2.1 to Port 2.4 respectively

0 = PWM0, PWM1, PWM2 and PWM3 output routed to Port 3.0 to Port 3.3 respectively
4 1 = 10 page available

0 = 6 page available
5 0 = standard device

6 to 11 reserved; normally set to logic 1

MAPPED ITEMS 11 10 9 8 7 6 5 4 3 2 1 0

Character ROM
address 09FFH

XXXXXXXUXXXX

Mapped to TXT12 −−−−−−−65432

BIT NUMBER FUNCTION

4 1 = Spanish character set present

0 = no Spanish character set present

0 to 3, 5 to 11 reserved; normally set to logic 1

1999 Oct 27 29

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

8.6 External (auxiliary) memory

The normal 80C51 external memory area has been
mappedinternallytothedevice,thismeansthatthe MOVX
instruction accesses memory internal to the device.

8.6.1 AUXILIARY RAM PAGE SELECTION
The Auxiliary RAM page pointer is used to select one of

the 256 pages within the Auxiliary RAM, not all pages are
allocated, refer to Fig.10 for further detail. A page consists
of 256 consecutive bytes.

Fig.9 Auxiliary RAM allocation.

(1) Amount of Data RAM depends on the device.
(2) Amount of Display RAM depends on the device.

handbook, halfpage

GSA031

CLUT

upper 32 kbyteslower 32 kbytes

FFFFH

8C00H

DISPLAY REGISTERS

87FFH

87F0H

871FH

8700H

DISPLAY RAM

FOR

TEXT PAGES

(2)

DATA RAM

(1)

47FFH

4800H

7FFFH

2000H
1FFFH
500H
4FFH

0000H

1999 Oct 27 30

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.10 Indirect addressing of Auxiliary RAM.

handbook, full pagewidth

MBK958

SFR XRAMP = 00H

FFH

00H

SFR XRAMP = 01H

FFH

00H

0000H

00FFH

0100H

01FFH

SFR XRAMP = FEH

MOVX @ DPTR,A
MOVX A, @ DPTR

MOVX @ Ri,A
MOVX A, @ Ri

FFH

00H

SFR XRAMP = FFH

FFH

00H

FE00H

FEFFH

FF00H

FFFFH

9 POWER-ON RESET

An automatic reset can be obtained when VDDis turned on
by connecting the RESET pin to V

DDP

through a
10 µF capacitor, providing the VDD rise time does not
exceed 1 ms, and the oscillator start-up time does not
exceed 10 ms.

To ensure correct initialisation, the RESET pin must be
held high long enough for the oscillator to settle following
power-up, usually a few ms. Once the oscillator is stable,
a further 24 clocks are required to generate the reset (two
machine cycles of the microcontroller). Once the above
reset condition has been detected an internal reset signal
is triggered which remains active for 2048 clock cycles.

1999 Oct 27 31

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

10 REDUCED POWER MODES

Thereare two power saving modes, Idleand Power-down,
incorporated into the 10 page devices. There is an
additional Standby mode incorporated into the 1 page
devices. When utilizing any mode, power to the device
(V

DDP,VDDC

andV

DDA

)shouldbemaintained, since power
saving is achieved by clock gating on a section by section
basis.

10.1 Idle mode

During Idle mode, Acquisition, Display and the Central
ProcessingUnit(CPU)sectionsofthedevicearedisabled.
The following functions remain active:

• Memory interface

• I2C-bus interface

• Timer/Counters

• Watchdog Timer

• Pulse Width Modulators.

To enter Idle mode the IDL bit in the PCON register must
be set. The Watchdog Timer must be disabled prior to
entering the Idle mode to prevent the device being reset.
Once in Idle mode, the crystal oscillator continues to run,
but the internal clock to the CPU, Acquisition and Display
are gated out. However, the clocks to the Memory
interface, I2C-bus interface, Timer/Counters, Watchdog
Timer and Pulse Width Modulators are maintained.
The CPU state is frozen along with the status of all SFRs,
internal RAM contents are maintained, as are the device
output pin values.

Sincethe output values on Red Green Blue (RGB) and the
Video Data Switch (VDS) are maintained the display
output must be disabled before entering this mode.

There are three methods to recover from Idle mode:

• Assertionof an enabled interrupt will cause the IDLbitto

be cleared by hardware, thus terminating Idle mode.
The interrupt is serviced, and following the instruction
RETI, the next instruction to be executed will be the one
after the instruction that put the device into Idle mode.

• A second method of exiting the Idle mode is via an

interrupt generated by the SAD DC Compare circuit.
When the device is configured in this mode, detection of
ananalogthreshold at the input to the SAD may be used
to trigger wake-up of the device i.e. TV Front Panel
Key-press. As above, the interrupt is serviced, and
following the instruction RETI, the next instruction to be
executedwillbetheonefollowingthe instruction that put
the device into Idle mode.

• The third method of terminating Idle mode is with an
external hardware reset. Since the oscillator is running,
the hardware reset need only be active for two machine
cycles (24 clocks at 12 MHz) to complete the reset
operation. Reset defines all SFRs and Display memory
to an initialized state, but maintains all other RAM
values. Code execution commences with the Program
Counter set to ‘0000’.

10.2 Power-down mode

In Power-down mode the crystal oscillator is stopped.
The contents of all SFRs and Data memory are
maintained,However,thecontentsoftheAuxiliary/Display
memoryarelost.Theportpinsmaintain the values defined
bytheir associated SFRs. Since the outputvalues on RGB
and VDS are maintained the display output must be made
inactive before entering Power-down mode.

The Power-down mode is activated by setting the PD bit in
the PCON register. It is advised to disable the Watchdog
Timer prior to entering power-down.

There are three methods of exiting power-down:

• An external interrupt provides the first mechanism for
waking from power-down. Since the clock is stopped,
externalinterruptsneedstobesetlevel sensitive prior to
entering power-down. The interrupt is serviced, and
following the instruction RETI, the next instruction to be
executed will be the one after the instruction that put the
device into Power-down mode.

• A second method of exiting power-down is via an
interrupt generated by the SAD DC Compare circuit.
When the device is configured in this mode, detection of
a certain analog threshold at the input to the SAD may
be used to trigger wake-up of the device i.e. TV Front
Panel Key-press. As above, the interrupt is serviced,
andfollowingtheinstructionRETI,thenextinstructionto
be executed will be the one following the instruction that
put the device into power-down.

• The third method of terminating the Power-down mode
is with an external hardware reset. Reset defines all
SFRs and Display memory, but maintains all other RAM
values. Code execution commences with the Program
Counter set to ‘0000’.

1999 Oct 27 32

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

10.3 Standby mode

This mode is only available on 1 page devices. When
Standby mode is entered both Acquisition and Display
sections are disabled. The following functions remain
active:

• 80C51 core

• Memory interface

• I2C-bus interface

• Timer/Counters

• Watchdog Timer

• Software ADC

• Pulse Width Modulators.

To enter Standby mode, the STANDBY control bit in the
ROMBK SFR (bit 7) must be set. It can be used in
conjunction with either Idle or Power-down modes to
switch between power saving modes. This mode enables
the 80C51 core to decode either IR remote commands or
receive I2C-bus commands without the device being fully
powered.

The Standby state is maintained upon exit from either the
Idle mode or Power-down mode. No wake-up from
Standby is necessary as the 80C51 core remains
operational.

Since the output values on RGB and VDS are maintained
the display output must be disabled before entering this
mode.

11 I/O FACILITY

11.1 I/O ports

The SAA55xx devices have 29 I/O lines, each is
individually addressable, or form three parallel 8-bit
addressable ports which are Port 0, Port 1 and Port 2.
Port 3 has 5-bit parallel I/O only.

11.2 Port type

All individual ports can be programmed to function in one
of four I/O configurations: open-drain, quasi-bidirectional,
high-impedance and push-pull. The I/O configuration is
selected using two associated Port Configuration
Registers:PnCFGA and PnCFGB (where n = port number
0, 1, 2 or 3); see Table 3.

11.2.1 OPEN-DRAIN

The open-drain configuration can be used for bidirectional
operation of a port. It requires an external pull-up resistor,
the pull-up voltage has a maximum value of 5.5 V, to allow
connection of the device into a 5 V environment.

The I2C-bus ports (P1.4,P1.5, P1.6 and P1.7) can only be
configured as open-drain.

11.2.2 QUASI-BIDIRECTIONAL

The quasi-bidirectional configuration is a combination of
open-drain and push-pull. It requires an external pull-up
resistortoV

DDP

(nominally3.3 V).Whena signal transition
from LOW-to-HIGH is output from the device, the pad is
put into push-pull configuration for one clock cycle
(166 ns) after which the pad goes into open-drain
configuration. This configuration is used to speed up the
edges of signal transitions. This is the default mode of
operation of the pads after reset.

11.2.3 HIGH-IMPEDANCE
The high-impedance configuration can be used for input

only operation of the port. When using this configuration
the two output transistors are turned off.

11.2.4 PUSH-PULL
The push-pull configuration can be used for output only.

In this mode the signal is driven to either 0 V or V

DDP

,

which is nominally 3.3 V.

11.3 Port alternate functions

Ports 1, 2 and 3 are shared with alternative functions to
enable control of external devices and circuitry.
The alternative functions are enabled by setting the
appropriate SFR and also writing a logic 1 to the port bit
that the function occupies.

11.4 LED support

Port pins P0.5 and P0.6 have a 8 mA current sinking
capability to enable LEDs in series with current limiting
resistors to be driven directly, without the need for
additional buffering circuitry.

1999 Oct 27 33

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

12 INTERRUPT SYSTEM

Thedevice has six interrupt sources,each of which can be
enabled or disabled. When enabled each interrupt can be
assigned one of two priority levels. There are four
interrupts that are common to the 80C51, two of these are
external interrupts (EX0 and EX1) and the other two are
timer interrupts (ET0 and ET1). In addition to the
conventional 80C51 interrupts, one application specific
interrupt is incorporated internal to the device which has
following functionality:

• Display Busy interrupt (EBUSY). An interrupt is
generatedwhen the display enters either aHorizontal or
Vertical Blanking Period. i.e. Indicates when the
microcontroller can update the Display RAM without
causing undesired effects on the screen. This interrupt
can be configured in one of two modes using the
Memory Mapped Register (MMR) Configuration
(address 87FFH, bit TXT/V):

– Text Display Busy. An interrupt is generated on each

active horizontal display line when the Horizontal
Blanking Period is entered

– Vertical Display Busy. An interrupt is generated on

each vertical display field when the Vertical Blanking
Period is entered.

12.1 Interrupt enable structure

Each of the individual interrupts can be enabled or
disabled by setting or clearing the relevant bit in the
Interrupt Enable Register (IE). All interrupt sources can
also be globally disabled by clearing the EA bit (IE.7).

12.2 Interrupt enable priority

Each interrupt source can be assigned one of two priority
levels. The interrupt priorities are defined by the Interrupt
Priority Register (IP). A low priority interrupt can be
interrupted by a high priority interrupt, but not by another
low priority interrupt. A high priority interrupt can not be
interruptedby any other interrupt source. If two requests of
different priority levels are received simultaneously, the
request with the highest priority level is serviced.

If requests of the same priority level are received
simultaneously, an internal polling sequence determines
which request is serviced. Thus, within each priority level
there is a second priority structure determined by the
polling sequence as defined in Table 8.

Table 8 Interrupt priority (within same level)

12.3 Interrupt vector address

The processor acknowledges an interrupt request by
executinga hardware generated LCALL to the appropriate
servicing routine. The interrupt vector addresses for each
source are shown in Table 8.

12.4 Level/edge interrupt

The external interrupt can be programmed to be either
level-activatedor transition-activated by setting or clearing
the IT0/IT1 bits in the Timer Control SFR (TCON).

Table 9 External interrupt activation

The external interrupt INT1 differs from the standard
80C51 interrupt in that it is activated on both edges when
in edge sensitive mode. This is to allow software pulse
width measurement for handling remote control inputs.

SOURCE

PRIORITY

WITHIN LEVEL

INTERRUPT

VECTOR

EX0 highest 0003H
ET0 − 000BH
EX1 − 0013H
ET1 − 001BH
ES2 − 002BH

EBUSY lowest 0033H

ITx LEVEL EDGE

0 active LOW −
1 − INT0 = negative edge

INTI = positive and negative edge

1999 Oct 27 34

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

handbook, full pagewidth

GSA033

priority
control

SFR IP<0:6

>

global

enable

SFR IE.7

L1H1highest priority level 0

highest priority level 1

L2

H2

L3

EX0

H3

L4

H4

L5

H5

L6

H6

source
enable

SFR IE<0:6

>

interrupt

source

lowest priority level 0

lowest priority level 1

ET0

EX1

ET1

ES2

EBUSY

Fig.11 Interrupt structure.

1999 Oct 27 35

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

13 TIMER/COUNTER

Two 16-bit timers/counters are incorporated Timer 0 and
Timer 1.Bothcanbe configured to operate as either timers
or event counters.

In Timer mode, the register is incremented on every
machine cycle. It is therefore counting machine cycles.
Since the machine cycle consists of twelve oscillator
periods, the count rate is1⁄12f

osc

= 1 MHz.

In Counter mode, the register is incremented in response
toanegativetransitionatitscorrespondingexternalpin T0
or T1. Since the pins T0 and T1 are sampled once per
machine cycle, it takes two machine cycles to recognise a
transition, this gives a maximum count rate of

1

⁄24f

osc

= 0.5 MHz.

There are six Special Function Registers used to control
the timers/counters. These are: TCON, TMOD, TL0, TH0,
TL1 and TH1.

Thetimer/counterfunctionisselectedby control bits C/Tin
the Timer Mode SFR (TMOD). These two Timer/Counters
havefouroperating modes, which are selected by bit-pairs
(M1 and M0) in TMOD. Detail of the modes of operation is
given in

“Handbook IC20, 80C51-Based 8-bit

Microcontrollers”

.

TL0 and TH0 are the actual Timer/Counter registers for
Timer 0. TL0 is the low byte and TH0 is the high byte.
TL1 and TH1 are the actual Timer/Counter registers for
Timer 1. TL1 is the low byte and TH1 is the high byte.

14 WATCHDOG TIMER

The Watchdog Timer is a counter that once in an overflow
state forces the microcontroller into a reset condition.
The purpose of the Watchdog Timer is to reset the
microcontroller if it enters an erroneous processor state
(possibly caused by electrical noise or RFI) within a
reasonable period of time. When enabled, the Watchdog
circuitry will generate a system reset if the user program
failstoreloadthe Watchdog Timer within a specified length
of time known as the Watchdog Interval (WI).

The Watchdog Timer consists of an 8-bit counter with an
11-bit prescaler. The prescaler is fed with a signal whose
frequency is1⁄12f

osc

(1 MHz for 12 MHz oscillator).

The 8-bit timer is incremented every ‘t’ seconds where:

14.1 Watchdog Timer operation

The Watchdog operation is activated when the WLE bit in
the Power Control SFR (PCON) is set. The Watchdog can
be disabled by software by loading the value 55H into the
Watchdog Key SFR (WDTKEY). This must be performed
before entering Idle or Power-down mode to prevent
exiting the mode prematurely.

Once activated the Watchdog Timer SFR (WDT) must be
reloaded before the timer overflows. The WLE bit must be
set to enable loading of the WDT SFR, once loaded the
WLE bit is reset by hardware, this is to prevent erroneous
software from loading the WDT SFR.

The value loaded into the WDT defines the Watchdog
Interval (WI).

The range of intervals is from WDT = 00H which gives
524 ms to WDT = FFH which gives 2.048 ms.

15 PULSE WIDTH MODULATORS

The device has eight 6-bit Pulse Width Modulated (PWM)
outputs for analog control of e.g. volume, balance, bass,
treble, brightness, contrast, hue and saturation. The PWM
outputs generate pulse patterns with a repetition rate of

21.33 µs, with the high time equal to the PWM SFR value
multiplied by 0.33 µs. The analog value is determined by
the ratio of the high time to the repetition time, a DC
voltage proportional to the PWM setting is obtained by
means of an external integration network (low-pass filter).

15.1 PWM control

The relevant PWM is enabled by setting the PWM enable
bitPWxEinthePWMx Control Register (where x = 0 to 7).
The high time is defined by the value PWxV<5:0>.

t 12 2048

1

f

osc

--------

12 2048

1

12 10

6

×

----------------------

2.048 ms=××=××=

WI 256 WDT–()t×256 WDT–()2.048 ms×==

1999 Oct 27 36

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

15.2 Tuning Pulse Width Modulator (TPWM)

The device has a single 14-bit PWM that can be used for
Voltage Synthesis Tuning. The method of operation is
similar to the normal PWM except the repetition period is

42.66 µs.

15.2.1 TPWM CONTROL

TwoSFRs are used to controlthe TPWM, they are TDACL
and TDACH. The TPWM is enabled by setting the
TPWE bit in the TDACH SFR. The most significant bits
TD<13:7> alter the high period between 0 and 42.33 µs.
The 7 least significant bits TD<6:0> extend certain pulses
by a further 0.33 µs, e.g. if TD<6:0> = 01H then
1 in 128 periods will be extended by 0.33 µs, if
TD<6:0> = 02H then 2 in 128 periods will be extended.

TheTPWMwillnotstarttooutputanewvalue until TDACH
has been written to. Therefore, if the value is to be
changed, TDACL should be written before TDACH.

15.3 Software ADC (SAD)

Four successive approximation Analog-to-Digital
Converterscanbeimplementedin software by making use
of the on-board 8-bit Digital-to-Analog Converter and
Analog Comparator.

15.3.1 SAD CONTROL

The control of the required analog input is done using the
channel select bits CH<1:0> in the SAD SFR, this selects
the required analog input to be passed to one of the inputs
of the comparator. The second comparator input is
generated by the DAC whose value is set by the bits
SAD<7:0> in the SAD and SADB SFRs. A comparison
between the two inputs is made when the start compare
bit ST in the SAD SFR is set, this must be at least one
instruction cycle after the SAD<7:0> value has been set.
The result of the comparison is given on VHI one
instruction cycle after the setting of ST.

15.3.2 SAD INPUT VOLTAGE

The external analog voltage that is used for comparison
with the internally generated DAC voltage does not have
the same voltage range. The DAC has a lower reference
level of V

SSA

and an upper reference level of V

SSP

.

The resolution of the DAC voltage with a nominal value is

3.3

⁄

256

≈ 13 mV. The external analog voltage has a lower

value equivalent to V

SSA

and an upper value equivalent to

V

DDP

− Vtn,whereVtnisthethresholdvoltageforanN type
Metal Oxide Semiconductor transistor. The reason for this
is that the input pins for the analog signals (P3.0 to P3.3)
are 5 V tolerant for normal port operations, i.e. when not
used as analog input. To protect the analog multiplexer
andcomparator circuitry from the 5 V, a series transistor is
used to limit the voltage. This limiting introduces a voltage
drop equivalent to Vtn (≈0.6 V) on the input voltage.
Therefore, for an input voltage in the range V

DDP

to

V

DDP

− Vtn the SAD returns the same comparison value.

15.3.3 SAD DC COMPARATOR MODE
The SAD module incorporates a DC Comparator mode

which is selected using the DC_COMP control bit in the
SADB SFR. This mode enables the microcontroller to
detect a threshold crossing at the input to the selected
analog input pin (P3.0/ADC0, P3.1/ADC1, P3.2/ADC2 or
P3.3/ADC3) of the Software ADC. A level sensitive
interrupt is generated when the analog input voltage level
at the pin falls below the analog output level of the SAD
DAC.

This mode is intended to provide the device with a
wake-upmechanism from Power-down or Idle mode when
a key-press on the front panel of the TV is detected.

The following software sequence should be used when
utilizing this mode for Power-down or Idle:

1. Disable INT1 using the IE SFR.

2. Set INT1 to level sensitive using the TCON SFR.

3. Set the DAC digital input level to the desired threshold

level using SAD/SADB SFRs and select the required
input pin (P3.0/ADC0, P3.1/ADC1, P3.2/ADC2 or
P3.3/ADC3) using CH<1:0> in the SAD SFR.

4. Enter DC Compare mode by setting the DC_COMP

enable bit in the SADB SFR.

5. Enable INT1 using the IE SFR.

6. Enter Power-down or Idle mode. Upon wake-up the

SAD should be restored to its conventional operating
mode by disabling the DC_COMP control bit.

1999 Oct 27 37

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.12 SAD block diagram.

handbook, halfpage

MBK960

MUX

4 : 1

ADC0

ADC1

ADC2

ADC3

CH<1:0

>

SAD<3:0

>

SADB<3:0

>

V

DDP

VHI

8-BIT
DAC

1999 Oct 27 38

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

16 I2C-BUS SERIAL I/O

The I2C-bus consists of a serial data (SDA) line and a
serial clock (SCL) line. The definition of the I2C-bus
protocol can be found in the document

“The I2C-bus and

howto use it (including specification)”

.Thisdocument may

be ordered using the code 9398 393 40011.
The device operates in four modes:

• Master transmitter

• Master receiver

• Slave transmitter

• Slave receiver.

The microcontroller peripheral is controlled by the Serial
Control SFR (S1CON) and its status is indicated by the
Status SFR (S1STA). Information is transmitted/received
to/from the I2C-bus using the Data SFR (S1DAT) and the
Slave Address SFR (S1ADR) is used to configure the
slave address of the peripheral.

The byte level I2C-bus serial port is identical to the I2C-bus
serial port on the P8xCE558, except for the clock rate
selection bits CR<2:0> in S1CON. The operation of the
subsystem is described in detail in the

“P8xCE558 data

sheet”

.

16.1 I

2

C-bus port selection

Two I2C-bus ports are available SCL0/SDA0 and
SCL1/SDA1. The selection of the port is done using
TXT21.I2C PORT 0 and TXT21.I2C PORT 1. When the
port is enabled, any information transmitted from the
device goes onto the enabled port. Any information
transmitted to the device can only be acted on if the port is
enabled.

If both ports are enabled then data transmitted from the
device is seen on both ports, however data transmitted to
the device on one port can not be seen on the other port.

17 MEMORY INTERFACE

The memory interface controls access to the embedded
Dynamic Random Access Memory (DRAM), refreshing of
the DRAM and page clearing. The DRAM is shared
between Data Capture, display and microcontroller
sections. The Data Capture section uses the DRAM to
store acquired information that has been requested.
The display reads from the DRAM information and
converts it into RGB values. The microcontroller uses the
DRAM as embedded auxiliary RAM.

17.1 Memory structure

The memory is partitioned into two distinct areas, the
dedicated Auxiliary RAM area, and the Display RAM area.
The Display RAM area when not being used for Data
Capture or display, can be used as an extension to the
auxiliary RAM area.

17.1.1 A

UXILIARY RAM

The Auxiliary RAM is not initialised at power-up.
The contents of the Auxiliary RAM are maintained during
Idle mode, but are lost if Power-down mode is entered.

17.1.2 DISPLAY RAM
The Display RAM is initialised on power-up to a value

of 20H throughout. The contents of the Display RAM are
maintained when entering Idle mode.If Idle mode isexited
using an interrupt then the contents are unchanged, if Idle
mode is exited using a reset then the contents are
initialised to 20H.

17.2 Memory mapping

ThededicatedAuxiliaryRAMareaoccupiesamaximumof
8 kbytes, with an address range from 0000H to 1FFFH.
The Display RAM occupies a maximum of 10 kbytes with
an address range from 2000H to 47FFH for TXT mode
(see Fig.13).

17.3 Addressing memory

The memory can be addressed by the microcontroller in
two ways, either directly using a MOVX command, or via
Special Function Registers depending on what address is
required.

The Display memory in the range 2000H to 47FFH can
either be directly accessed using the MOVX, or via the
Special Function Registers.

17.3.1 TXT DISPLAY MEMORY SFR ACCESS
The Display memory when in TXT mode (see Fig.14) is

configured as 40 columns wide by 25 rows and occupies
1K × 8 bits of memory. There can be a maximum of
10 display pages. Using TXT15.BLOCK<3:0>, the
required display page can be selected to be written to.
The row and column within that block is selected using
TXT9.R<4:0> and TXT10.C<5:0>. The data at the
selected position can be read or written using
TXT11.D<7:0>.

1999 Oct 27 39

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Whenever a read or write is performed on TXT11, the row
values stored in TXT9 and column value stored in TXT10
are automatically incremented. For rows 0 to 24 the
column value is incremented up to a maximum of 39, at
which point it resets to ‘0’ and increments the row counter
value. When row 25 column 23 is reached the values of
the row and column are both reset to zero.

Writing values outside of the valid range for TXT9 or
TXT10 will cause undetermined operation of the
auto-incrementing function for accesses to TXT11.

17.3.2 TXT DISPLAY MEMORY MOVX ACCESS
It is important for the generation of OSD displays, that use

this mode of access, to understand the mapping of the
MOVX address onto the display row and column value.
This mapping of row and column onto address is shown in
Table 10. The values shown are added onto a base
addressfor the required memory block (see Fig.13) to give
a 16-bit address.

17.4 Page clearing

Pageclearingisperformedonrequestfromeitherthe Data
Capture block, or the microcontroller under the control of
the embedded software.

At power-on and reset the whole of the page memory is
cleared.The TXT13.PAGE CLEARING bit will beset while
this takes place.

17.4.1 DATA CAPTURE PAGE CLEAR
When a page header is acquired for the first time after a

new page request or a page header is acquired with the
erase (C4) bit set the page memory is ‘cleared’ to spaces
before the rest of the page arrives.

When this occurs, the space code (20H) is written into
every location of rows 1 to 23 of the basic page memory,
the appropriate packet 27 row of the extension packet
memory and the row where teletext packet 24 is written.
This last row is either row 24 of the basic page memory, if
the TXT0.X24 POSN bit is set, or row 0 of the extension
packet memory, if the bit is not set. Page clearing takes
place before the end of the TV line in which the header
arrived which initiated the page clear.

This means that the 1 field gap between the page header
and the rest of the page which is necessary for many
teletext decoders is not required.

17.4.2 SOFTWARE PAGE CLEAR
The software can also initiate a page clear, by setting the

TXT9.CLEAR MEMORY bit. When it does so, every
location in the memory block pointed to by
TXT15.BLOCK<3:0> is cleared to a space code (20H).
The CLEAR MEMORY bit is not latched so the software
does not have to reset it after it has been set.

Only one page can be cleared in a TV line so if the
software requests a page clear it will be carried out on the
nextTV line on which the Data Capture hardware does not
force the page to be cleared. A flag, TXT13.PAGE
CLEARING, is provided to indicate that a software
requested page clear is being carried out. The flag is set
when a logic 1 is written into the TXT9.CLEAR MEMORY
bit and is reset when the page clear has been completed.

If TXT0.INV ON bit = 1 and a page clear is initiated on
Block 8 all locations are cleared to 00H.

Table 10 Column and row to MOVX address (lower 10bits of address)

ROW COL. 0 ..... COL. 23 ..... COL. 31 COL. 32 ..... COL. 39

Row 0 000H ..... 017H ..... 01FH 3F8H ..... 3FFH

Row 1 020H ..... 037H ..... 03FH 3F0H ..... 3F7H

: ::::::::

: ::::::::

Row 23 2E0H ..... 3F7H ..... 2FFH 340H ..... 347H

Row 24 300H ..... 317H ..... 31FH 338H ..... 33FH

Row 25 320H ..... 337H ..... ..... ..... ..... :

1999 Oct 27 40

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

handbook, halfpage

GSA034

lower 32 kbytes

AUXILIARY

TXT BLOCK 0

0000H

2000H

TXT BLOCK 9

2400H

TXT BLOCK 1

2800H

TXT BLOCK 2

2C00H

TXT BLOCK 3

3000H

TXT BLOCK 4

3400H

TXT BLOCK 5

3800H

TXT BLOCK 6

3C00H

TXT BLOCK 7

4000H

TXT BLOCK 8

4400H

7FFFH

Fig.13 DRAM memory mapping.

1999 Oct 27 41

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.14 TXT memory map.

handbook, full pagewidth

0203010

C

9023

39

Column

10

MBK962

control data

active position TXT9.R<4:0> = 01H, TXT10.C<5:0> = 0AH, TXT11 = 43H

non-displayable data
(byte 10 reserved)

Row 0

1
2
3
4
5
6
7
8
9

10

11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

1999 Oct 27 42

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

18 DATA CAPTURE

The Data Capture section takes in the analog Composite
Video and Blanking Signal (CVBS), and from this extracts
the required data, which is then decoded and stored in
memory.

The extraction of the data is performed in the digital
domain. The first stage is to convert the analog CVBS
signal into a digital form. This is done using an ADC
sampling at 12 MHz. The data and clock recovery is then
performed by a Multi-Rate Video Input Processor
(MulVIP). From the recovered data and clock the following
data types are extracted: WST Teletext (625/525), VPS
and WSS. The extracted data is stored in either memory
(DRAM) via the Memory interface or in SFR locations.

18.1 Data Capture features

• Two CVBS inputs

• Video Signal Quality detector

• Data Capture for 625-line WST

• Data Capture for 525-line WST

• Data Capture for VPS data (Programme Delivery

Control (PDC) system A)

• Data Capture for Wide Screen Signalling (WSS) bit
decoding

• Automatic selection between 525 WST/625 WST

• Automatic selection between 625 WST/VPS on line 16

of Vertical Blanking Interval (VBI)

• Real-time capture and decoding for WST Teletext in
hardware, to enable optimized microprocessor
throughput

• Up to 10 pages stored on-chip

• Inventory of transmitted Teletext pages stored in the

Transmitted Page Table (TPT) and Subtitle Page Table
(SPT)

• Automatic detection of FASTEXT transmission

• Real-time packet 26 engine in hardware for processing

accented, G2 and G3 characters

• Signal quality detector for WST/VPS data types

• Comprehensive Teletext language coverage

• Full Field and Vertical Blanking Interval (VBI) data

capture of WST data.

Fig.15 Data capture block diagram.

handbook, full pagewidth

ADC

data<7:0

>

VCS

SYNC_FILTER

TTDTTC

DATA SLICER

AND

CLOCK RECOVERY

output data to memory interface and SFRs

GSA032

ACQUISITION

FOR

WST/VPS/WSS

CVBS

SWITCH

CVBS

CVBS0 CVBS1

ACQUISITION

TIMING

SYNC

SEPARATOR

1999 Oct 27 43

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

18.1.1 CVBS SWITCH
The CVBS switch is used to select the required analog

input depending on the value of TXT8.CVBS1/CVBS0.

18.1.2 ANALOG-TO-DIGITAL CONVERTER
The output of the CVBS switch is passed to a

differential-to-single-ended converter, although in this
device it is used in single-ended configuration with a
reference. The analog output of the differential amplifier is
converted into a digital representation by a full flash ADC
with a sampling rate of 12 MHz.

18.1.3 MULTI-RATE VIDEO INPUT PROCESSOR
The multi-rate video input processor is a Digital Signal

Processor designed to extract the data and recover the
clock from a digitised CVBS signal.

18.1.4 DATA STANDARDS
The data and clock standards that can be recovered are

shown in Table 11.

Table 11 Data slicing standards

18.1.5 DATA CAPTURE TIMING
The Data Capture timing section uses the synchronisation

information extracted from the CVBS signal to generate
the required horizontal and vertical reference timings.

The timing section automatically recognises and selects
the appropriate timings for either 625 (50 Hz)
synchronisation or 525 (60 Hz) synchronisation. A flag
TXT12.VIDEO SIGNAL QUALITY is set when the timing
section is locked correctly to the incoming CVBS signal.
When TXT12.VIDEO SIGNAL QUALITY is set another
flag TXT12.525/625 SYNC can be used to identify the
standard.

18.1.6 ACQUISITION
The acquisition sections extracts the relevant information

from the serial stream of data from the MulVIP and stores
it in memory.

18.1.6.1 Making a page request

A page is requested by writing a series of bytes into the
TXT3.PRD<4:0> SFRwhichcorrespondstothe number of
the page required. The bytes written into TXT3 are stored
in a RAM with an auto-incrementing address. The start
address for the RAM is set using the TXT2.SC<2:0> to
define which part of the page request is being written, and
TXT2.REQ<3:0> is used to define which of the 10 page
requests is being modified. If TXT2.REQ<3:0> is greater
than 09H, then data being written to TXT3 is ignored.
Table 12 shows the contents of the page request RAM.

Up to 10 pages of teletext can be acquired on the 10 page
device, when TXT1.EXT PKT OFF is setto logic 1, and up
to 9 pages can be acquired when this bit is set to logic 0.
Fora20 pagedevicethe10 pageacquisitionchannelsare
banked, the bank being selected using TXT2.ACQ BANK.

If the ‘DO CARE’ bit for part of the page number is set to
logic 0 then that part of the page number is ignored when
the teletext decoder is deciding whether a page being
received off air should be stored or not. For example, if the
‘DO CARE’ bits for the four subcode digits are all set to
logic 0 then every subcode version of the page will be
captured.

Table 12 The contents of the Page request RAM

DATA STANDARD

CLOCK RATE

(MHz)

625 WST 6.9375
525 WST 5.7272

VPS 5.0

WSS 5.0

START

COLUMN

PRD4 PRD3 PRD2 PRD1 PRD0

0 DO CARE

Magazine

HOLD MAG2 MAG1 MAG0

1 DO CARE

Page Tens

PT3 PT2 PT1 PT0

2 DO CARE

Page Units

PU3 PU2 PU1 PU0

3 DO CARE

Hour Tens

X X HT1 HT0

4 DO CARE

Hours
Units

HU3 HU2 HU1 HU0

5 DO CARE

Minutes
Tens

X MT2 MT1 MT0

6 DO CARE

Minutes
Units

MU3 MU2 MU1 MU0

7X XXE1E0

1999 Oct 27 44

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

When the HOLD bit is set to a logic 0 the teletext decoder
will not recognise any page as having the correct page
number and no pages will be captured. In addition to
providing the user requested hold function this bit should
beused to prevent the inadvertent captureof an unwanted
page when a new page request is being made.
For example, if the previous page request was for
page 100 and this was being changed to page 234, it
would be possible to capture page 200 if this arrived after
only the requested magazine number had been changed.

TheE1andE0bitscontroltheerrorcheckingwhichshould
be carried out on packets 1 to 23 when the page being
requested is captured. This is described in more detail in
Section 18.1.6.3.

For a multi-page device, each packet can only be written
into one place in the teletext RAM so if a page matches
more than one of the page requests the data is written into
theareaofmemorycorrespondingtothelowestnumbered
matching page request.

At power-up each page request defaults to any page, hold
on and error check Mode 0.

18.1.6.2 Rolling headers and time

When a new page has been requested it is conventional
for the decoder to turn the header row of the display green
and to display each page header as it arrives until the
correct page has been found.

Whena page request is changed(i.e. when the TXT3 SFR
is written to) a flag (PBLF) is written into bit 5, column 9,
row 25 of the corresponding block of the page memory.
The state of the flag for each block is updated every TV
line, if it is set for the current display block, the acquisition
section writes all valid page headers which arrive into the
display block and automatically writes an alphanumeric
green character into column 7 of row 0 of the displayblock
every TV line.

When a requested page header is acquired for the first
time, rows 1 to 23 of the relevant memory block are
cleared to space, i.e. have 20H written into every column,
before the rest of the page arrives. Row 24 is also cleared
if the TXT0.X24 POSN bit is set. If the
TXT1.EXT PKT OFF bit is set the extension packets
corresponding to the page are also cleared.

The last 8 characters of the page header are used to
provideatimedisplayandarealwaysextractedfromevery
valid page header as it arrives and written into the display
block.

TheTXT0.DISABLE HEADER ROLL bit preventsanydata
being written into row 0 of the page memory except when
a page is acquired off air i.e. rolling headers and time are
not written into the memory. The TXT1.ACQ OFF bit
prevents any data being written into the memory by the
teletext acquisition section.

When a parallel magazine mode transmission is being
received only headers in the magazine of the page
requested are considered valid for the purposes of rolling
headersand time. Only one magazine is used evenifdon’t
care magazine is requested. When a serial magazine
mode transmission is being received all page headers are
considered to be valid.

18.1.6.3 Error checking

Before teletext packets are written into the page memory
they are error checked. The error checking carried out
dependson the packet number, the bytenumber, the error
check mode bits in the page request data and the
TXT1.8-BIT bit.

If an uncorrectable error occurs in one of the Hamming
checked addressing and control bytes in the page header
or in the Hamming checked bytes in packet 8/30, bit 4 of
the byte written into the memory is set, to act as an error
flag to the software. If uncorrectable errors are detected in
any other Hamming checked data the byte is not written
into the memory.

1999 Oct 27 45

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.16 Error checking.

handbook, full pagewidth

MGK465

3938373635343332313029282726252423222120191817161514131211109876543210

'8-bit' bit = 0

3938373635343332313029282726252423222120191817161514131211109876543210

'8-bit' bit = 1

Packet X/0

3938373635343332313029282726252423222120191817161514131211109876543210

'8-bit' bit = 0, error check mode = 0

3938373635343332313029282726252423222120191817161514131211109876543210

'8-bit' bit = 0, error check mode = 1

3938373635343332313029282726252423222120191817161514131211109876543210

'8-bit' bit = 0, error check mode = 2

3938373635343332313029282726252423222120191817161514131211109876543210

'8-bit' bit = 0, error check mode = 3

3938373635343332313029282726252423222120191817161514131211109876543210

'8-bit' bit = 1

Packet X/1-23

3938373635343332313029282726252423222120191817161514131211109876543210

'8-bit' bit = 0

3938373635343332313029282726252423222120191817161514131211109876543210

'8-bit' bit = 1

Packet X/24

3938373635343332313029282726252423222120191817161514131211109876543210

Packet X/27/0

3938373635343332313029282726252423222120191817161514131211109876543210

Packet 8/30/0,1

3938373635343332313029282726252423222120191817161514131211109876543210

8-bit
data

Packet 8/30/2,3,4-15

odd parity
checked

8/4 Hamming
checked

1999 Oct 27 46

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.17 Packet storage locations.

(1) If ‘X24 POSN’ bit = 1.
(2) VPS data block 9, unused in blocks 0 to 8.
(3) Byte 10 reserved.

handbook, full pagewidth

Row 0

1

2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19

20

21

22
23
24
25

0678

9023

39

Packet X/0

Basic Page Blocks (0 to 8/9)

OSD only

Packet X/1
Packet X/2
Packet X/3
Packet X/4
Packet X/5
Packet X/6
Packet X/7
Packet X/8
Packet X/9
Packet X/10
Packet X/11
Packet X/12
Packet X/13
Packet X/14
Packet X/15
Packet X/16
Packet X/17
Packet X/18
Packet X/19
Packet X/20
Packet X/21
Packet X/22
Packet X/23
Packet X/24

(1)

GSA003

Control Data VPS Data

(2)

10

(3)

1999 Oct 27 47

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

18.1.6.4 Teletext memory organisation

The teletext memory is divided into 2 banks of 10 blocks.
Normally, when the TXT1.EXT PKT OFF bit is logic 0,
each of blocks 0 to 8 contains a teletext page arranged in
the same way as the basic page memory of the page
device and block 9 contains extension packets. When the
TXT1.EXT PKT OFF bit is logic 1, no extension packets
are captured and block 9 of the memory is used to store
another page. The number of the memory block intowhich
a page is written corresponds to the page request number
which resulted in the capture of the page.

Packet 0, the page header, is split into two parts when it is
writtenintothetextmemory.Thefirst8 bytesoftheheader
contain control and addressing information. They are
Hamming decoded and written into columns 0 to 7 of
row 25. Row 25 also contains themagazine number of the
acquired page and the PLBF flag but the last 14 bytes are
unused and may be used by the software, if necessary.

Fig.18 Extension packet storage locations.

(1) If ‘X24 POSN’ bit = 0.
(2) Byte 10 reserved.

handbook, full pagewidth

GSA002

0
1
2
3
4
5
6
7
8
9

9230

10
11
12
13
14
15

20
21
22
23
24
25

16
17
18
19

Row

Packet X/24 for page in block 0

(1)

Packet X/24 for page in block 1

(1)

Packet X/27/0 for page in block 0

Packet X/27/0 for page in block 1
Packet X/24 for page in block 2

(1)

Packet X/27/0 for page in block 2
Packet X/24 for page in block 3

(1)

Packet X/27/0 for page in block 3
Packet X/24 for page in block 4

(1)

Packet X/27/0 for page in block 4
Packet X/24 for page in block 5

(1)

Packet X/27/0 for page in block 5
Packet X/24 for page in block 6

(1)

Packet X/27/0 for page in block 6
Packet X/24 for page in block 7

(1)

Packet X/27/0 for page in block 7
Packet X/24 for page in block 8

(1)

Packet X/27/0 for page in block 8

Packet 8/30/0.1
Packet 8/30/2.3

Packet 8/30/4-15

VPS Data

Extension Packet Block (9)

10

(2)

1999 Oct 27 48

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

18.1.6.5 Row 25 data contents

The Hamming error flags are set if the on-board 8/4
Hamming checker detects that there has been an
uncorrectable (2-bit) error in the associated byte. It is
possible for the page to still be acquired if some of the
page address information contains uncorrectable errors if
thatpartof the page request was a ‘don’t care’. There is no
error flag for the magazine number as an uncorrectable
error in this information prevents the page being acquired.

The interrupt sequence (C9) bit is automatically dealt with
by the acquisition section so that rolling headers do not
contain a discontinuity in the page number sequence.

The magazine serial (C11) bit indicates whether the
transmission is a serial or a parallel magazine
transmission. This affects the way the acquisition section
operates and is dealt with automatically.

The newsflash (C5), subtitle (C6), suppress header (C7),
inhibit display (C10) and language control (C12 to 14) bits
are dealt with automatically by the display section.

The update (C8) bit has no effect on the hardware.
The remaining 32 bytes of the page header are parity
checked and written into columns 8 to 39 of row 0. Bytes
which pass the parity check have the MSB set to a logic 0
and are written into page memory. Bytes with parity errors
are not written into the memory.

Table 13 The data in row 25 of the basic page memory

COL BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

0000Hamming error PU3 PU2 PU1 PU0
1000Hamming error PT3 PT2 PT1 PT0
2000Hamming error MU3 MU2 MU1 MU0
3000Hamming error C4 MT2 MT1 MT0
4000Hamming error HU3 HU2 HU1 HU0
5000Hamming error C6 C5 HT1 HT0
6000Hamming error C10 C9 C8 C7
7000Hamming error C14 C13 C12 C11
8000

FOUND 0 MAG2 MAG1 MAG0

9 0 0 PBLF 0 0000

10 to 23 −−−unused −−−−

1999 Oct 27 49

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

18.1.6.6 Inventory page

Ifthe TXT0.INV ON bit is a logic 1, memoryblock 8 is used
as an inventory page.The inventory page consists of two
tables: the Transmitted Page Table (TPT) and the Subtitle
Page Table (SPT).

In each table, every possible combination of the page tens
and units digit, 00H to FFH, is represented by a byte.

Eachbitofthese bytes corresponds to a magazinenumber
so each page number, from 100H to 8FFH, is represented
by a bit in the table.

The bit for a particular page in the TPT is set when a page
header is received for that page. The bit in the SPT is set
whenapageheaderforthepageisreceivedwhichhas the
‘subtitle’ page header control bit (C6) set. The bit for a
particular page in the TPT is set when a page header is
received for that page. The bit in the SPT is set when a
page header for the page is received which has the
‘subtitle’ page header control bit (C6) set.

Fig.19 Transmitted/subtitle page organisation.

handbook, full pagewidth

x00

x01

x02

x03

x04

x05

x06

x07

x08

x09

x0a

x0b

x0c

x0d

x0e

x0f

x10

x11

x12

x13

x14

x15

x16

x17

x18

x19

x1a

x1b

x1c

x1d

x1e

x1f

x20

x21

x22

x23

x24

x25

x26

x27

x28

x29

x2a

x2b

x2c

x2d

x2e

x2f

x30

x31

x32

x33

x34

x35

x36

x37

x38

x39

x3a

x3b

x3c

x3d

x3e

x3f

xc0

xc1

xc2

xc3

xc4

xc5

xc6

xc7

xc8

xc9

xca

xcb

xcc

xcd

xce

xcf

xd0

xd1

xd2

xd3

xd4

xd5

xd6

xd7

xd8

xd9

xda

xdb

xdc

xdd

xde

xdf

xe0

xe1

xe2

xe3

xe4

xe5

xe6

xe7

xe8

xe9

xea

xeb

xec

xed

xee

xfef

xf0

xf1

xf2

xf3

xf4

xf5

xf6

xf7

xf8

xf9

xfa

xfb

xfc

xfd

xfe

xff

7xx

bit

7

Bytes in the table

bits in each byte

column

row n

n + 1

n + 6
n + 7

0

0

MGD160

81624 3239

6xx

5xx

4xx

3xx

2xx 1xx

8xx

1999 Oct 27 50

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.20 Inventory page organisation.

handbook, full pagewidth

MGD165

0
1
2
3
4
5
6
7
8
9

230

039

10
11
12
13
14
15

20
21
22
23
24
25

16
17
18
19

Row

Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused

Transmitted

Pages

Table

Subtitle

Pages

Table

1999 Oct 27 51

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

18.1.6.7 Packet 26 processing

One of the uses of packet 26 is to transmit characters
whichare not in the basic teletext character set.Thefamily
automatically decodes packet 26 data and, if a character
corresponding to that being transmitted is available in the
character set, automatically writes the appropriate
character code into the correct location in the teletext
memory. This is not a full implementation of the packet 26
specification allowed for in level 2 teletext, and so is often
referred to as level 1.5.

By convention, the packets 26 for a page are transmitted
before the normal packets. To prevent the default
character data overwriting the packet 26 data the device
incorporates a mechanism which prevents packet 26 data
from being overwritten. The mechanism is disabled when
the Spanish national option is detected as the Spanish
transmission system sends even parity (i.e. incorrect)
characters in the basic page locations corresponding to
the characters sent via packet 26 and these will not
overwrite the packet 26 characters anyway. The special
treatment of Spanish national option is prevented if
TXT12.ROM VER3 is logic 0 or if the TXT8.DISABLE
SPANISH is set.

Packet 26 data is processed regardless of the
TXT1.EXT PKT OFF bit, but setting theTXT1.X26 OFF
disables packet 26 processing.

The TXT8.PKT26 RECEIVED bit is set by the hardware
whenever a character is written into the page memory by
thepacket 26decodinghardware.Theflagcanbe reset by
writing a logic 0 into the SFR bit.

18.1.7 WST ACQUISITION
The family is capable of acquiring Level 1.5 625-line and

525-line World System Teletext.

18.2 Broadcast service data detection

Whenapacket 8/30isdetected,orapacket 4/30whenthe
device is receiving a 525 line transmission, the
TXT13. PKT 8/30 flag is set. The flag can be reset by
writing a 0 into the SFR bit.

18.3 VPS acquisition

When the TXT0.VPS ON bit is set, any VPS data present
on line 16, field 0 of the CVBS signal at the input of the
teletext decoder is error checked and stored in row 25,
block 9 of the basic page memory. The device
automatically detects whether teletext or VPS is being
transmitted on this line and decodes the data
appropriately.

Each VPS byte in the memory consists of 4 biphase
decoded data bits (bits 0 to 3), a biphase error flag (bit 4)
and three logic 0s (bits 5 to 7).

The TXT13.VPS RECEIVED bit is set by the hardware
whenever VPS data is acquired.

Full details of the VPS system can be found in the

“Specification of the Domestic Video Programme Delivery
Control System (PDC); EBU Tech. 3262-E”.

18.4 WSS acquisition

The Wide Screen Signalling data transmitted on line 23
gives information on the aspect ratio and display position
of the transmitted picture, the position of subtitles and on
the camera/film mode. Some additional bits are reserved
for future use. A total of 14 data bits are transmitted.

All of the available data bits transmitted by the Wide
Screen Signalling signal are captured and stored in SFRs
WSS1,WSS2 and WSS3. The bitsare stored as groups of
related bits, and an error flag is provided for each group to
indicate when a transmission error has been detected in
one or more of the bits in the group.

Wide screen signalling data is only acquired when the
TXT8.WSS ON bit is set.

The TXT8.WSS RECEIVED bit is set by the hardware
wheneverwidescreen signalling data is acquired. The flag
can be reset by writing a logic 0 into the SFR bit.

Fig.21 VPS data storage.

handbook, full pagewidth

teletext page

header data

VPS

byte 11

row 25

10 11

column

0

9

MBK964

VPS

byte 12

VPS

byte 13

VPS

byte 14

VPS

byte 15

VPS

byte 4

VPS

byte 5

12 13 14 15 16 17 18 19 20 21 22 23

1999 Oct 27 52

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

19 DISPLAY

The display section is based on the requirements for a
Level 1.5 WST Teletext. There are some enhancements
for use with locally generated OSDs.

The display section reads the contents of the Display
memory and interprets the control/character codes. From
this information and other global settings, the display
produces the required RGB signals and Video/Data (Fast
Blanking) signal for a TV signal processing device.

The display is synchronised to the TV signal processing
device by way of horizontal and vertical sync signals
provided by external circuits (Slave Sync mode). From
these signals all display timings are derived.

19.1 Display features

• Teletext and Enhanced On-Screen Display (OSD)
modes

• Level 1.5 WST features

• Single/Double/Quadruple Width and Height for

characters

• Variable flash rate controlled by software

• Fixed character matrix (H × V) 12 × 10

• Soft colours using Colour Look Up Table (CLUT) with

4096 colour palette

• Fringing (Shadow) selectable from N-S-E-W direction

• Fringe colour selectable

• Meshing of defined area

• Contrast reduction of defined area

• Cursor

• 1 WST Character set (G0/G2) in single device (e.g.

Latin or Cyrillic or Greek or Arabic)

• G1 Mosaic graphics, Limited G3 Line drawing
characters.

Fig.22 Display block diagram.

handbook, full pagewidth

MICROPROCESSOR

INTERFACE

DISPLAY

TIMING

HSYNC

CLK VSYNC

CHARACTER

FONT

ADDRESSING

address

address

data

data

address

address

data

data

address

data

control

to memory interface

from memory interface

FUNCTION

REGISTERS

PARALLEL/SERIAL

CONVERTER

AND FRINGING

ATTRIBUTE

HANDLING

CLUT RAM

DISPLAY DATA

ADDRESSING

MBK965

CHARACTER

ROM

AND

DRCs

DATA

BUFFER

DAC DACDAC

GBFBR

1999 Oct 27 53

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

19.2 Display mode

Thedisplayisconfigured as WST with additional serial and
global attributes. The display is configured as a fixed
25 rows with 40 characters per row.

19.3 Display feature descriptions

19.3.1 FLASH
Flashing causes the foreground colour pixel to be

displayed as the background pixels.The flash frequency is
controlled by software setting and resetting the MMR
Status (see Table 24) at the appropriate interval.

This attribute is set by the control character ‘flash’ (08H)
(see Fig.26) and remains valid until the end of the row or
until reset by the control character ‘steady’ (09H).

19.3.2 BOXES
Two types of boxes exist, the Teletext box and the

OSD box. The Teletext box is activated by the ‘start box’
control character (0BH), two start box characters are
required to begin a Teletext box, with the box starting
between the two characters. The box ends at the end of
the line or after a ‘end box’ control character.

OSD boxes are started using size implying OSD control
characters (BCH, BDH, BEH and BFH). The box starts
after the control character (‘set after’) and ends either at
the end of the row or at the next size implying OSD
character (‘set at’). The attributes flash, Teletext box,
conceal, separate graphics, twist and hold graphics are all
reset at the start of an OSD box, as they are at the start of
the row. OSD boxes are only valid in TV mode which is
defined by TXT5 = 03H and TXT6 = 03H.

19.3.3 SIZE
The size of the characters can be modified in both the

horizontal and vertical directions.
Three horizontal sizes are available normal (×1),

double (×2), quadruple (×4). The control characters
‘normal size’ (0CH/BCH) enables normal size, the ‘double
width’ or ‘double size’ (0EH/BEH/0FH/BFH) enables
double width characters.

Any two consecutive combination of ‘double width’ or
‘double size’ (0EH/BEH/0FH/BFH) activates quadruple
width characters, provided quadruple width characters are
enabled by TXT4.QUAD WIDTH ENABLE.

Threeverticalsizesareavailablenormal (×1), double (×2),
quadruple (×4). The control characters ‘normal size’
(0CH/BCH) enable normal size, the ‘double height’ or
‘double size’ (0DH/BDH/0FH/BFH) enable double height
characters. Quadruple height characters are achieved by
using double height characters and setting the global
attributes TXT7.DOUBLE HEIGHT (expand) and
TXT7.BOTTOM/TOP.

If double height characters are used in Teletext mode,
single height characters in the lower row of the double
height character are automatically disabled.

19.3.4 COLOURS

19.3.4.1 Colour Look Up Table (CLUT)

ACLUT with 16 colour entries is provided. The colours are
programmable out of a palette of 4096 (4 bits per
R, G and B).TheCLUTisdefinedbywriting data to a RAM
that resides in the MOVX address space of the 80C51.

Table 14 CLUT colour values

19.3.5 F

OREGROUND COLOUR

The foreground colour is selected via a control character
(see Fig.26). The colour control characters take effect at
the start of the next character (set-after) and remain valid
until the end of the row, or until modified by a control
character. Only 8 foreground colours are available.

The TEXT foreground control charactersmap to the CLUT
entries as shown in Table 15.

RED<3:0>

(B11 TO B8)

GRN<3:0>

(B7 TO B4)

BLUE<3:0>

(B3 TO B0)

COLOUR

ENTRY

0000 0000 0000 0
0000 0000 1111 1

... ... ... ...

1111 1111 0000 14
1111 1111 1111 15

1999 Oct 27 54

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Table 15 Foreground CLUT mapping

19.3.6 BACKGROUND COLOUR
The control character new background (1DH) is used to

change the background colour to the current foreground
colour. The selection is immediate (set at) and remains
valid until the end of the row or until otherwise modified.

The TEXT background control characters map to the
CLUT entries as shown in Table 16.

Table 16 Background CLUT mapping

19.3.7 FRINGING
Thedisplayof fringing is controlled by the TXT4.SHADOW

bit.
When set all the alphanumeric characters being displayed

are shadowed, graphics characters are not shadowed.

19.3.8 MESHING
The attribute effects the background colour being

displayed. Alternate pixels are displayed as the
background colour or video. The structure is offset by
1 pixel from scan line to scan line, thus achieving a
checkerboarddisplay of the background colour and video.

TXT: There are two meshing attributes one that only
affectsblackbackgroundcoloursTXT4.B MESH ENABLE
and a second that only affects backgrounds other than
black TXT4.C MESH ENABLE. A black background is
defined as CLUT entry 8, a non-black background is
defined as CLUT entry 9 to 15.

19.3.9 CURSOR
The cursor operates by reversing the background and

foreground colours in the character position pointed to by
the active cursor position. The cursor is enabled using
TXT7.CURSOR ON. When active, the row the cursor
appears on is defined by TXT9.R<4:0> and the column is
defined by TXT10.C<5:0>. The position of the cursor can
be fixed using TXT9.CURSOR FREEZE.

The valid range for row positioning is 0 to 24. The valid
range for column is 0 to 39.

CONTROL

CODE

DEFINED
COLOUR

CLUT ENTRY

00H black 0
01H red 1
02H green 2
03H yellow 3
04H blue 4
05H magenta 5
06H cyan 6
07H white 7

CONTROL

CODE

DEFINED
COLOUR

CLUT ENTRY

00H + 1DH black 8
01H + 1DH red 9
02H + 1DH green 10
03H + 1DH yellow 11
04H + 1DH blue 12
05H + 1DH magenta 13
06H + 1DH cyan 14
07H + 1DH white 15

1999 Oct 27 55

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.23 South and south-west fringing.

handbook, full pagewidth

MBK972

handbook, full pagewidth

MBK973

Fig.24 Meshing and meshing/fringing (south + west).

Fig.25 Cursor display.

handbook, full pagewidth

MBK971

ABC DEF

1999 Oct 27 56

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

19.4 Character and attribute coding

The character coding is in a serial format, with only one
attribute being changed at any single location. The serial
attributes take effect either at the position of the attribute
(setat), or at the followinglocation (set after). The attribute
remains effective until either modified by new serial
attributes or until the end of the row.

The default settings at the start of a row is:

• Foreground colour white (CLUT address 7)

• Background colour black (CLUT address 8)

• Horizontal size ×1, vertical size ×1 (normal size)

• Alphanumeric on

• Contiguous Mosaic Graphics

• Release Mosaics

• Flash off

• Box off

• Conceal off

• Twist off.

The attributes have individual codes which are defined in
the basic character table (see Fig.26).

1999 Oct 27 57

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with

On-Screen Display (OSD)

SAA55xx

This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in

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white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader. white to force landscape pages to be ...

handbook, full pagewidth

MBK974

normal

height

b3b2b1b

0

b

4

b

5

b

6

b

7

0 1 2 2a 3 3a 4 5 6 6a 7 7a 8 8a 9a9C

column

r
o
w

B

I
T
S

0

0

0

0

0

0

0

1

0

1

0

0

0

1

0

1

1

0

0

0

1

0

0

1

A

1

0

1

0

1

1

0

0

0

1

1

0

0

0

1

1

0

0

1

0

0

1

1

1

E1 1 1 0

double

width

hold

graphics

F1 1 1 1

double

size

release

graphics

B1 0 1 1 start box twist

C1 1 0 0

black
back -

ground

D1 1 0 1

double

height

new

back -

ground

A1 0 1 0 end box

separated

graphics

91 0 0 1 steady

contiguous

graphics

8

1 0 0 0

flash

conceal
display

70 1 1 1

alpha
white

graphics

white

60 1 1 0

alpha
cyan

graphics

cyan

5

0 1 0 1

alpha

magenta

graphics
magenta

40 1 0 0

alpha

blue

graphics

blue

30 0 1 1

alpha

yellow

graphics

yellow

2

0 0 1 0

alpha
green

graphics

green

0

0 0 0 0

alpha
black

graphics

black

10 0 0 1

alpha

red

graphics

red

B

1

0

1

1

DEF

1

1

0

1

1

1

1

0

1

1

1

1

DEF

1

1

0

1

1

1

1

0

1

1

1

1

double

width
OSD

double

size

OSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSDOSD

OSD

E/W = 0 E/W = 1

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

OSD

nat
opt

nat
opt

nat
opt

nat
opt

nat
opt

nat
opt

nat
opt

nat
opt

nat
opt

nat
opt

nat
opt

nat
opt

nat
opt

nat
opt

normal

size
OSD

double

height

OSD

back-

ground

white

back-

ground

cyan

back-

ground

magenta

back-

ground

blue

back­ground
yellow

back­ground

green

back­ground

black
back

ground

red

OSD

character dependent on the language of page, refer to National Option characters

customer definable On-Screen Display character

Fig.26 TXT basic character set (Pan-European).

1999 Oct 27 58

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

19.5 Screen and global controls

A number of attributes are available that affect the whole
display region, and cannot be applied selectively to
regions of the display.

19.5.1 DISPLAY MODES
The display mode is controlled by the bits in the TXT5 and

TXT6. There are three control functions: Text on,
Background on and Picture on. Separate sets of bits are
used inside and outside teletext boxes so that different
display modes can be invoked. TXT6 is used if the
newsflash (C5) or subtitle (C6) bits in row 25 of the basic
pagememory are set, otherwise TXT5 is used. This allows
the software to set up the type of display required on
newsflash and subtitle pages (e.g. text inside boxes,
TV picture outside) this will be invoked without any further
software intervention when such a page is acquired.

When teletext box control characters are present in the
display page memory, the appropriate box control bit must
be set, TXT7.BOX ON 0, TXT7.BOX ON 1 − 23 or
TXT7.BOX ON 24. This allows the display mode to be
different inside the Teletext box compared to outside.
These bits are present to allow boxes in certain areas of
the screen to be disabled.

The use of teletext boxes for OSD messages has been
superseded in this device by the OSD box concept, but
these bits remain to allow teletext boxes to be used, if
required.

19.6 Screen colour

Screen colour is displayed from 10.5 to 62.5 ms after the
active edge of the HSYNCinput and on TV lines 23 to 310
inclusive, for a 625-line display, and lines 17 to 260
inclusive for a 525-line display.

The register bits TXT17.SCREEN COL<2:0> can be used
to define a colour to be displayed in place of TV picture
and the black background colour. If the bits are all set to
zero, the screen colour is defined as ‘transparent’ and
TV picture and background colour are displayed as
normal. Otherwise the bits define CLUT entries 9 to 15.

19.7 Text display control

The display is organised as a fixed size of 25 rows
(0 to 24) of 40 columns (0 to 39), This is the standard size
for teletext transmissions. The control data in row 25 isnot
displayed but is used to configure the display page
correctly.

Table 17 TXT display control bits

PICTURE ON TEXT ON BACKGROUND ON EFFECT

0 0 X Text mode, black screen
0 1 0 Text mode, background always black
0 1 1 Text mode
1 0 X Video mode
1 1 0 Mixed text and TV mode
1 1 1 Text mode, TV picture outside text area

1999 Oct 27 59

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Fig.27 TXT text area.

handbook, full pagewidth

0

9023

39

10

MBK968

control data

non-displayable data
byte 10 reserved

Row 0

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

1999 Oct 27 60

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

19.8 Display positioning

The display consists of the screen colour covering the
whole screen and the text area that is placed within the
visible screen area.

The screen colour extends over a large vertical and
horizontal range so that no offset is needed. The text area
is offset in both directions relative to the vertical and
horizontal sync pulses.

Fig.28 Display area positioning.

handbook, full pagewidth

MGL150

56 µs

text area start

0.25 character
offset

horizontal

sync

delay

horizontal sync

vertical

sync

6 lines

offset

text

vertical

offset

screen colour

offset = 8 µs

text area end

SCREEN COLOUR AREA

TEXT AREA

1999 Oct 27 61

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

19.8.1 SCREEN COLOUR DISPLAY AREA
This area is covered by the screen colour. The screen

colour display area starts with a fixed offset of 8 µs from
the leading edge of the horizontal sync pulse in the
horizontal direction. A vertical offset is not necessary.

Table 18 Screen colour display area

19.8.2 TEXT DISPLAY AREA
The text area can be defined to start with an offset in both

the horizontal and vertical direction.

Table 19 Text display area

The horizontal offset is set in the MMR Text Area Start.
The offset is done in full width characters using TAS<5:0>
and quarter characters using HOP<1:0> for fine setting.
The values 00H to 08H for TAS<5:0> will result in a
corrupted display.

The width of the text area is defined in the MMR Text Area
End by setting the end character value TAE<5:0>. This
number determines where the background colour of the
textareawillendifsettoextendtotheendoftherow.It will
alsoterminatethecharacterfetch process thus eliminating
the necessity of a row end attribute. This entails however
writing to all positions.

The vertical offset is set in the MMR Text Position Vertical
Register. The offset value VOL<5:0> is done in number of
TV scan lines.

Note that the Text Position Vertical Register should not be
set to 00H as the Display Busy interrupt is not generated
in these circumstances.

19.9 Character set

A set can consist of alphanumeric characters as required
by WST Teletext or customer definable OSD characters.

Two character sets can be displayed at once. These are
the basic G0 set or the alternate G2 set (Twist Set).
The basic set is selected using TXT18.BS<1:0>.
The alternate/twist character set is defined by
TXT19.TS<1:0>. Since the alternate character set is an
option it can be enabled or disabled using TXT19.TEN,
and the language code that is defined for the alternate set
is defined by TXT19.TC<2:0>.

19.10 Display synchronization

The horizontal and vertical synchronizing signals from the
TV deflection are used as inputs. Both signals can be
inverted before being delivered to the Phase Selector
section.

SFRs bits TXT1.HPOLARITY and TXT1.VPOLARITY
control the polarity.

Alinelocked12 MHz clock is derived from the 12 MHz free
running oscillator by the Phase Selector. This line locked
clock is used to clock the whole of the Display block.

The horizontal and vertical sync signals are synchronized
with the 12 MHz clock before being used in the Display
section.

19.11 Video/data switch (fast blanking) polarity

The polarity of the Video/data (fast blanking) signal can be
inverted. The polarity is set with the VDSPOL bit in the
MMR RGB Brightness.

Table 20 Fast blanking signal polarity

VECTOR DESCRIPTION

Horizontal Start at 8 µs after leading edge of

horizontal sync for 56 µs.

Vertical Line 9, field 1 (321, field 2) to leading

edge of vertical sync (line numbering
using 625 standard).

VECTOR DESCRIPTION

Horizontal Up to 40 full sized characters per row.

Start position setting from 8 to 64
characters from the leading edge of
horizontal sync. Fine adjustment in
quarter characters.

Vertical 256 lines (nominal 41 to 297). Start

position setting from leading edge of
vertical sync, legal values are 4 to 64
lines. (line numbering using
625 standard).

VDSPOL VDS CONDITION

0 1 RGB display
0 0 Video display
1 0 RGB display
1 1 Video display

1999 Oct 27 62

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

19.12 Video/data switch adjustment

To take into account the delay between the RGB values
and the VDS signal due to external buffering, the VDS
signal can be moved in relation to the RGB signals.
The VDSsignalcanbesettobeeitheraclockcycle before
or after the RGB signal, or coincident with the RGB signal.
This is done using VDEL<2:0> in the MMR Configuration.

19.13 RGB brightness control

A brightness control is provided to allow the RGB upper
output voltage level to be modified. The nominal value is
1 V into a 15 Ω resistor, but can be varied between

0.7 and 1.2 V.
The brightness is set in the RGB Brightness Register.

Table 21 RGB brightness

19.14 Contrast reduction

The

COR bits in SFRs TXT5 and TXT6 control when the
COR output of the device is activated (i.e. pulled LOW).
This output is intended to act on the TVs display circuits to
reduce contrast of the video when it is active. The result of
contrast reduction is to improve the readability of the text
in a mixed teletext and video display.

The bits in the TXT5 and TXT6 SFRs allow the display to
be set up so that, for example, the areas inside teletext
boxes will be contrast reduced when a subtitle is being
displayed but that the rest of the screen will be displayed
as normal video.

20 MEMORY MAPPED REGISTERS (MMR)

The memory mapped registers are used to control the
display. The registers are mapped into the microcontroller
MOVX address space, starting at address 87F0H and
extending to 87FFH.

Table 22 MMR address summary

BRI3 TO BRI0 RGB BRIGHTNESS

0000 lowest value

... ...

1111 highest value

REGISTER

NO.

MEMORY

ADDRESS

FUNCTION

1 87F1H Text Position Vertical
2 87F2H Text Area Start
3 87F3H Fringing Control
4 87F4H Text Area End
7 87F7H RGB Brightness

8 87F8H Status
12 87FCH HSYNC Delay
13 87FDH VSYNC Delay
15 87FFH Configuration

1999 Oct 27 63

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Table 23 MMR map

Table 24 MMR bit definition

ADD R/W NAME 7 6 5 4 3 2 1 0 RESET

87F1 R/W Text Position

Vertical

−−VOL5 VOL4 VOL3 VOL2 VOL1 VOL0 00H

87F2 R/W Text Area

Start

HOP1 HOP0 TAS5 TAS4 TAS3 TAS2 TAS1 TAS0 00H

87F3 R/W Fringing

Control

FRC3 FRC2 FRC1 FRC0 FRDN FRDE FRDS FRDW 00H

87F4 R/W Text Area

End

−−TAE5 TAE4 TAE3 TAE2 TAE1 TAE0 00H

87F7 R/W RGB

Brightness

VDSPOL −−−BRI3 BRI2 BRI1 BRI0 00H

87F8 R Status BUSY FIELD − FLR −−−− 00H

W −−−FLR −−− − 00H

87FC R/W HSYNC

Delay

− HSD6 HSD5 HSD4 HSD3 HSD3 HSD1 HSD0 00H

87FD R/W VSYNC

Delay

− VSD6 VSD5 VSD4 VSD3 VSD2 VSD1 VSD0 00H

87FF R/W Configuration − VDEL2 VDEL1 VDEL0 TXT/V −− − 00H

REGISTER FUNCTION

Text Position Vertical

VOL5 to VOL0 display start vertical offset from VSYNC (lines)

Text Area Start

HOP1 to HOP0 fine horizontal offset in quarter of characters
TAS5 to TAS0 text area start

Fringing Control

FRC3 to FRC0 fringing colour, value address of CLUT
FRDN fringe in north direction (logic 1)
FRDE fringe in east direction (logic 1)
FRDS fringe in south direction (logic 1)
FRDW fringe in west direction (logic 1)

Text Area End

TAE5 to TAE0 text area end, in full characters

RGB Brightness

VDSPOL VDS polarity

0 = RGB (1), Video (0)
1 = RGB (0), Video (1)

BRI3 to BRI0 RGB brightness control

1999 Oct 27 64

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Status read

BUSY access to display memory could cause display problems (logic 1)
FIELD even field (logic 1)
FLR active flash region background only displayed (logic 1)

Status write

FLR active flash region background colour only displayed (logic 1)

HSYNC Delay

HSD6 to HSD0 HSYNC delay, in full size characters

VSYNC Delay

VSD6 to VSD0 VSYNC delay in number of 8-bit 12 MHz clock cycles

Configuration

VDEL2 to VDEL0 pixel delay between VDS and RGB output

000 = VDS switched to video, not active
001 = VDS active one pixel earlier then RGB
010 = VDS synchronous to RGB
100 = VDS active one pixel after RGB

TXT/V BUSY signal switch; horizontal (logic 1)

REGISTER FUNCTION

1999 Oct 27 65

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

21 LIMITING VALUES

In accordance with Absolute Maximum Rating System (IEC 134).

Note

1. This maximum value refers to 5 V tolerant I/Os and may be 6 V maximum but only when VDD is present.

22 CHARACTERISTICS

VDD= 3.3 V ± 10%; VSS=0V; T

amb

= −20 to +70 °C; unless otherwise specified.

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

DDX

supply voltage (all supplies) −0.5 +4.0 V

V

I

input voltage (any input) note 1 −0.5 VDD+ 0.5 or 4.1 V

V

O

output voltage (any output) note 1 −0.5 VDD+ 0.5 V

I

O

output current (each output) −±10 mA

I

IOK

DC input or output diode current −±20 mA

T

amb

operating ambient temperature −20 +70 °C

T

stg

storage temperature −55 +125 °C

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supplies

V

DDX

any supply voltage (VDD to VSS) 3.0 3.3 3.6 V

I

DDP

periphery supply current note 1 1 −− mA

I

DDC

core supply current − 15 18 mA

I

DDC(id)

Idle mode core supply current − 4.6 6 mA

I

DDC(pd)

Power-down mode core supply
current

− 0.76 1 mA

I

DDC(stb)

Standby mode core supply
current

− 5.11 6.50 mA

I

DDA

analog supply current − 45 48 mA

I

DDA(id)

Idle mode analog supply current − 0.87 1 mA

I

DDA(pd)

Power-down mode analog
supply current

− 0.45 0.7 mA

I

DDA(stb)

Standby mode analog supply
current

− 0.95 1.20 mA

Digital inputs

RESET
V

IL

LOW-level input voltage −−1.34 V

V

IH

HIGH-level input voltage 1.49 − 5.5 V

V

hys

hysteresis voltage of Schmitt
trigger input

0.44 − 0.58 V

I

LI

input leakage current VI=0 −−0.17 µA

R

pd

equivalent pull-down resistance VI=V

DD

55.73 70.71 92.45 kΩ

1999 Oct 27 66

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

HSYNC, VSYNC
V

IL

LOW-level input voltage −−1.31 V

V

IH

HIGH-level input voltage 1.44 − 5.5 V

V

hys

hysteresis voltage of Schmitt
trigger input

0.40 − 0.56 V

I

LI

input leakage current VI=0toV

DD

−−0.00 µA

Digital outputs

FRAME, VDS
V

OL

LOW-level output voltage IOL=3mA −−0.13 V

V

OH

HIGH-level output voltage IOH= 3 mA 2.84 −− V

t

r

output rise time 10% to 90%;

CL=70pF

7.50 8.85 10.90 ns

t

f

output fall time 10% to 90%;

CL=70pF

6.70 7.97 10.00 ns

COR (OPEN-DRAIN OUTPUT)
V

OL

LOW-level output voltage IOL=3mA −−0.14 V

V

OH

HIGH-level pull-up output
voltage

IOL= −3 mA;
push-pull

2.84 −− V

V

IL

LOW-level input voltage −−0.00 V

V

IH

HIGH-level input voltage 0.00 − 5.50 V

I

LI

input leakage current VI=0toV

DD

−−0.12 µA

t

r

output rise time 10% to 90%;

CL=70pF

7.20 8.64 11.10 ns

t

f

output fall time 10% to 90%;

CL=70pF

4.90 7.34 9.40 ns

Digital input/outputs

P0.0 TO P0.4, P0.7, P1.0 TO P1.1, P2.1 TO P2.7, P3.0 TO P3.7
V

IL

LOW-level input voltage −−1.28 V

V

IH

HIGH-level input voltage 1.43 − 5.50 V

V

hys

hysteresis voltage of Schmitt
trigger input

0.41 − 0.55 V

I

LI

input leakage current VI=0toV

DD

−−0.01 µA

V

OL

LOW-level output voltage IOL=4mA −−0.18 V

V

OH

HIGH-level output voltage IOH= −4 mA;

push-pull

2.81 − 5.50 V

t

r

output rise time 10% to 90%;

CL=70pF
push-pull

6.50 8.47 10.70 ns

t

f

output fall time 10% to 90%;

CL=70pF

5.70 7.56 10.00 ns

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

1999 Oct 27 67

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

P1.2, P1.3 AND P2.0
V

IL

LOW-level input voltage −−1.29 V

V

IH

HIGH-level input voltage 1.45 − 5.50 V

V

hys

hysteresis voltage of Schmitt
trigger input

0.42 − 0.56 V

I

LI

input leakage current VI=0toV

DD

−−0.02 µA

V

OL

LOW-level output voltage IOL=4mA −−0.17 V

V

OH

HIGH-level output voltage IOH= −4 mA;

push-pull

2.81 − 5.50 V

t

r

output rise time 10% to 90%;

CL= 70 pF;
push-pull

7.00 8.47 10.50 ns

t

f

output fall time 10% to 90%;

CL=70pF

5.40 7.36 9.30 ns

P0.5 AND P0.6
V

IL

LOW-level input voltage −−1.28 V

V

IH

HIGH-level input voltage 1.43 − 5.50 V

I

LI

input leakage current VI=0toV

DD

−−0.11 µA

V

hys

hysteresis voltage of Schmitt
trigger input

0.42 − 0.58 V

V

OL

LOW-level output voltage IOL=8mA −−0.20 V

V

OH

HIGH-level output voltage IOH= −8 mA;

push-pull

2.76 − 5.50 V

t

r

output rise time 10% to 90%;

CL= 70 pF;
push-pull

7.40 8.22 8.80 ns

t

f

output fall time 10% to 90%;

CL=70pF

4.20 4.57 5.20 ns

P1.4 TO P1.7 (OPEN-DRAIN)
V

IL

LOW-level input voltage −−1.45 V

V

IH

HIGH-level input voltage 1.62 − 5.50 V

V

hys

hysteresis voltage of Schmitt
trigger input

0.49 − 0.60 V

I

LI

input leakage current VI=0toV

DD

−−0.13 µA

V

OL

LOW-level output voltage IOL=8mA −−0.35 V

t

f

output fall time 10% to 90%;

CL=70pF

69.70 83.67 103.30 ns

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

1999 Oct 27 68

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Analog inputs

CVBS0 AND CVBS1
V

sync

sync voltage amplitude 0.1 0.3 0.6 V

V

vid(p-p)

video input voltage amplitude
(peak-to-peak value)

0.7 1.0 1.4 V

Z

source

source impedance 0 − 250 Ω

V

IH

HIGH-level input voltage 3.0 − V

DDA

+ 0.3 V

C

I

input capacitance −−10 pF
IREF
R

gnd

resistor to ground resistor

tolerance 2%

− 24 − kΩ

ADC0 TO ADC3
V

IH

HIGH-level input voltage −−V

DDA

V

C

I

input capacitance −−10 pF
VPE
V

IH

HIGH-level input voltage −−9.0 V

Analog outputs

R, G AND B
I

OL

output current (black Level) V

DDA

= 3.3 V −10 − +10 µA

I

OH

output current (maximum

Intensity)

V

DDA

= 3.3 V
Intensity level
code = 15 dec

6.0 6.67 7.3 mA

output current (70% of full
Intensity)

V

DDA

= 3.3 V
Intensity level
code = 0 dec

4.2 4.7 5.1 mA

R

load

load resistor to V

SSA

resistor
tolerance 5%

− 150 −Ω

C

L

load capacitance −−15 pF

Analog input/output

SYNC_FILTER
C

sync

storage capacitor to ground − 100 − nF

V

sync

sync filter level voltage for
nominal sync amplitude

0.35 0.55 0.75 V

Crystal oscillator

XTALIN
V

IL

LOW-level input voltage V

SSA

−− V

V

IH

HIGH-level input voltage −−V

DDA

V

C

I

input capacitance −−10 pF

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

1999 Oct 27 69

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

Notes

1. Peripheral current is dependent on external components and voltage levels on I/Os.

2. Crystal order number 4322 143 05561.

3. If the 4322 143 05561 crystal is not used, then the formulae in the crystal specification should be used. Where
CIO= 7 pF, the mean of the capacitances due to the chip at XTALIN and at XTALOUT. C

ext

is a value for the mean
of the stray capacitances due to the external circuit at XTALIN and XTALOUT. The maximum value for the crystal
holder capacitance is to ensure start-up, C

osc

may need to be reduced from the initially selected value.

4. C

osc(typ)

=2CL−CIO− C

ext

5. C

0(max)

=35−1⁄2(C

osc+CIO+Cext

)

XTALOUT
C

O

output capacitance −−10 pF
Crystal specification; notes 2 and 3
f

xtal

nominal frequency fundamental

mode

− 12 − MHz

C

L

crystal load capacitance − -30 pF
C

1

crystal motional capacitance T

amb

=25°C −−20 fF

R

r

resonance resistance T

amb

=25°C −−60 Ω

C

osc

capacitors at XTALIN, XTALOUT T

amb

=25°C − note 4 − pF

C

0

crystal holder capacitance T

amb

=25°C −−note 5 pF

T

xtal

temperature range −20 +25 +85 °C
X

j

adjustment tolerance T

amb

=25°C −−±50 × 10

−6

X

d

drift −−±100 × 10

−6

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

1999 Oct 27 70

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

22.1 I2C-bus characteristics
Table 25 I

2

C-bus characteristics

Notes

1. A device must internally provide a hold time of at least 300 ns for the SDA signal (referred to the V

IL(min)

of the SCL

signal) in order to bridge the undefined region of the falling edge of SCL.

2. The maximum f

HD;DAT

has only to be met if the device does not stretch the LOW period t

LOW

of the SCL signal.

3. A fast-mode I2C-bus device can be used in a standard mode I2C-bus system but the requirement t

SU;DAT

≥250 ns
must then be met. This will automatically be the case if the device does not stretch the LOW period of the SCL signal.
If such a device does stretch the LOW period of the SCL signal, it must output the next data bit to the SDA line
t

r(max)+tSU;DAT

= 1000 + 250 +1250 ns (according to the standard mode I2C-bus specification) before the SCL line

is released.

SYMBOL PARAMETER

FAST-MODE I

2

C-bus

UNIT

MIN. MAX.

f

SCL

SCL clock frequency 0 400 kHz

t

BUF

bus free time between a STOP and START condition 1.3 −µs

t

HD;STA

hold time (repeated) START condition. After this period, the
first clock pulse is generated.

0.6 −µs

t

LOW

LOW period of the SCL clock 1.3 −µs

t

HIGH

HIGH period of the SCL clock 0.6 −µs

t

SU;STA

set-up time for a repeated START condition 0.6 −µs

t

HD;DAT

data hold time; notes 1 and 2 0 0.9 µs

t

SU;DAT

data set-up time, note 3 100 − ns

t

r

rise time of both SDA and SCL signals 20 300 ns

t

f

fall time of both SDA and SCL signals 20 300 ns

t

SU;STO

set-up time for STOP condition 0.6 −µs

C

b

capacitive load for each bus line − 400 pF

1999 Oct 27 71

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

23 QUALITY AND RELIABILITY

This device will meet Philips Semiconductors General Quality Specification for Business group

“Consumer Integrated

Circuits SNW-FQ-611-Part E”

. The principal requirements are shown in Tables 26 to 29.

23.1 Group A
Table 26 Acceptance tests per lot

Note

1. ppm = fraction of defective devices, in parts per million.

23.2 Group B
Table 27 Processability tests (by package family)

23.3 Group C
Table 28 Reliability tests (by process family)

Note

1. FPM = fraction of devices failing at test condition, in Failures Per Million.

Table 29 Reliability tests (by device type)

TEST REQUIREMENTS

(1)

Mechanical cumulative target: <80 ppm
Electrical cumulative target: <100 ppm

TEST REQUIREMENTS

Solderability 0/16 on all lots
Mechanical 0/15 on all lots
Solder heat resistance 0/15 on all lots

TEST CONDITIONS REQUIREMENTS

(1)

Operational life 168 hours at Tj= 150 °C <1000 FPM at Tj= 150 °C
Humidity life temperature, humidity,bias 1000 hours,

85 °C, 85% RH (or equivalent test)

<2000 FPM

Temperature cycling performance T

stg(min)

to T

stg(max)

<2000 FPM

TEST CONDITIONS REQUIREMENTS

ESD and latch-up ESD Human body model 100 pF, 1.5 kΩ 2000 V

ESD Machine model 200 pF, 0 Ω 200 V
latch-up 100 mA, 1.5 × V

DD

(absolute maximum)

1999 Oct 27 72

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with

On-Screen Display (OSD)

SAA55xx

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24 APPLICATION INFORMATION

handbook, full pagewidth

MBK980

2

V

DD

V

DD

V

afc

AV status

program+

program−

plus(+)

minus(−)

menu

V

tune

V

SS

V

SS

V

SS

V

DD

V

DD

V

DD

V

DD

V

SSD

V

DDP

V

DDC

V

SSP

V

SSA

V

SS

VPE

V

SS

V

SS

V

SS

P2.1/PWM0

3

P2.2/PWM1

4

P2.3/PWM2

5

P2.4/PWM3

6

P2.5/PWM4

7

P2.6/PWM5

8

P2.7/PWM6

9

P3.0/ADC0
P3.1/ADC1
P3.2/ADC2

P0.0

VHF-L
VHF-H

UHF

TV control

signals

P3.3/ADC3

10
11
12
13
14
15
16
17
18
19
20
21

P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7

G
B

V

DDA

HSYNC
VDS
R

VSYNC

XTALOUT
XTALIN
OSCGND

P1.0/INT1

RESET

P3.4/PWM7

IREF

100 nF
100 nF

100 nF

FRAME

SYNC_FILTER

CVBS1

CVBS0

CVBS (IF)

CVBS (SCART)

22
23
24

26

25

29

27

28

1

51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30

52

P2.0/TPWM

A2

P1.4/SCL1
P1.7/SDA0
P1.6/SCL0
P1.3/T1
P1.2/INT0
P1.1/T0

P1.5/SDA1

SDA

A1

SCL

A0

RC

brightness

contrast

saturation

hue
volume (L)
volume (R)

V

DD

V

SS

1 kΩ

1 kΩ

150 Ω

24 kΩ

V

DD

40 V

V

SS

V

SS

V

DD

V

SS

PH2369

47 µF

V

DD

V

SS

100 nF

COR

V

SS

V

DD

47 µF

10 µF

100 nF

56 pF

V

DD

V

DD

V

DD

V

SS

V

SS

EEPROM

PCF8582E

SAA55xx

IR

RECEIVER

12 MHz

to TV’s
display
circuits

TV
control
signals

field flyback
line flyback

Fig.29 Application diagram.

1999 Oct 27 73

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

25 ELECTROMAGNETIC COMPATIBILITY (EMC)

GUIDELINES

Optimization of circuit return paths and minimisation of
commonmode emission will be assisted by using a double
sided Printed-Circuit Board (PCB) with low inductance
ground plane.

Onasinglesided printed-circuit board a local groundplane
under the whole Integrated Circuit (IC) should be present
as shown in Fig.30. This should be connected by the
widest possible connection back to the printed-circuit
board ground connection, and bulk electrolytic decoupling
capacitor. It should preferably not connect to other
grounds on the way, and nowire links should be presentin
this connect. The use of wire links increases ground
bounce by introducing inductance into the ground.

The supply pins can be decoupled at the pin to the ground
plane under the IC. This is easily accomplished using
surface mount capacitors, which are more effective than
leaded components at high frequency.

Using a device socket will unfortunately add to the area
and inductance of the external bypass loop.

A ferrite bead or inductor with resistive characteristics at
high frequencies may be utilised in the supply line close to
the decoupling capacitor to provide a high impedance.
To prevent pollution by conduction onto the signal lines
(which may then radiate) signals connected to the V

DD

supply via a pull-up resistor should not be connected to
the IC side of this ferrite component.

OSCGND should be connected only to the crystal load
capacitors and not to the local or circuit ground.

Physical connection distances to associated active
devices should be short.

Output traces should be routed with close proximity to
mutually coupled ground return paths.

Fig.30 Power supply connections for EMC.

handbook, full pagewidth

electrolytic decoupling capacitor (2 µF)

ferrite beads

SM decoupling capacitors (10 to 100 nF)

under-IC GND plane

IC

MBK979

V

SSC

V

SSA

V

DDP

V

SSP

V

DDC

V

DDA

GND

+3.3 V

other
GND
connections

under-IC GND plane
GND connection
note: no wire links

1999 Oct 27 74

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

26 PACKAGE OUTLINES

UNIT b

1

cEe M

H

L

REFERENCES

OUTLINE
VERSION

EUROPEAN

PROJECTION

ISSUE DATE

IEC JEDEC EIAJ

mm

DIMENSIONS (mm are the original dimensions)

SOT247-1

90-01-22
95-03-11

b

max.

w

M

E

e

1

1.3

0.8

0.53

0.40

0.32

0.23

47.9

47.1

14.0

13.7

3.2

2.8

0.181.778 15.24

15.80

15.24

17.15

15.90

1.73

5.08 0.51 4.0

M

H

c

(e )

1

M

E

A

L

seating plane

A

1

w M

b

1

D

A

2

Z

52

1

27

26

b

E

pin 1 index

0 5 10 mm

scale

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

(1) (1)

D

(1)

Z

e

A

max.

12

A

min.

A

max.

SDIP52: plastic shrink dual in-line package; 52 leads (600 mil)

SOT247-1

1999 Oct 27 75

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

UNIT

A

max.

A1A2A3bpcE

(1)

eH

E

LL

p

Zywv θ

REFERENCES

OUTLINE
VERSION

EUROPEAN

PROJECTION

ISSUE DATE

IEC JEDEC EIAJ

mm

1.6

0.20

0.05

1.5

1.3

0.25

0.28

0.16

0.18

0.12

14.1

13.9

0.5

16.25

15.75

1.15

0.85

7
0

o
o

0.12 0.10.21.0

DIMENSIONS (mm are the original dimensions)

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

0.75

0.45

SOT407-1

95-12-19
97-08-04

D

(1) (1)(1)

14.1

13.9

H

D

16.25

15.75

E

Z

1.15

0.85

D

b

p

e

θ

E

A

1

A

L

p

detail X

L

(A )

3

B

25

c

D

H

b

p

E

H

A

2

v M

B

D

Z

D

A

Z

E

e

v M

A

X

1

100

76

75

51

50

26

y

pin 1 index

w M

w M

0 5 10 mm

scale

LQFP100: plastic low profile quad flat package; 100 leads; body 14 x 14 x 1.4 mm

SOT407-1

1999 Oct 27 76

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

27 SOLDERING

27.1 Introduction to soldering through-hole mount
packages

This text gives a brief insight to wave, dip and manual
soldering.Amorein-depthaccountofsoldering ICs can be
found in our

“Data Handbook IC26; Integrated Circuit

Packages”

(document order number 9398 652 90011).

Wave soldering is the preferred method for mounting of
through-hole mount IC packages on a printed-circuit
board.

27.2 Soldering by dipping or by solder wave

The maximum permissible temperature of the solder is
260 °C; solder at this temperature must not be in contact
with the joints for more than 5 seconds.

Thetotalcontacttimeofsuccessivesolderwavesmust not
exceed 5 seconds.

The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T

stg(max)

). If the
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.

27.3 Manual soldering

Apply the soldering iron (24 V or less) to the lead(s) of the
package, either below the seating plane or not more than
2 mm above it. If the temperature of the soldering iron bit
is less than 300 °C it may remain in contact for up to
10 seconds. If the bit temperature is between
300 and 400 °C, contact may be up to 5 seconds.

27.4 Suitability of through-hole mount IC packages for dipping and wave soldering methods

Note

1. For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board.

PACKAGE

SOLDERING METHOD

DIPPING WAVE

DBS, DIP, HDIP, SDIP, SIL suitable suitable

(1)

1999 Oct 27 77

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

28 DEFINITIONS

29 LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.

30 PURCHASE OF PHILIPS I

2

C COMPONENTS

Data sheet status

Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.

Limiting values

Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.

Application information

Where application information is given, it is advisory and does not form part of the specification.

Purchase of Philips I

2

C components conveys a license under the Philips’ I2C patent to use the
components in the I2C system provided the system conforms to the I2C specification defined by
Philips. This specification can be ordered using the code 9398 393 40011.

1999 Oct 27 78

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

NOTES

1999 Oct 27 79

Philips Semiconductors Preliminary specification

Standard TV microcontrollers with
On-Screen Display (OSD)

SAA55xx

NOTES

© Philips Electronics N.V. SCA
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.

The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
under patent- or other industrial or intellectual property rights.

Internet: http://www.semiconductors.philips.com

1999

68

Philips Semiconductors – a w orldwide compan y

For all other countries apply to: Philips Semiconductors,

International Marketing & Sales Communications, Building BE-p, P.O. Box 218,
5600 MD EINDHOVEN, The Netherlands, Fax. [phone]

Argentina: see South America
Australia: 3 Figtree Drive, HOMEBUSH, NSW 2140,

Tel. [phone], Fax. [phone]
Austria: Computerstr. 6, A-1101 WIEN, P.O. Box 213,

Tel. [phone], Fax. [phone]
Belarus: Hotel Minsk Business Center, Bld. 3, r. 1211, Volodarski Str. 6,

220050 MINSK, Tel. [phone], Fax. [phone]

Belgium: see The Netherlands
Brazil: see South America
Bulgaria: Philips Bulgaria Ltd., Energoproject, 15th floor,

51 James Bourchier Blvd., 1407 SOFIA,
Tel. [phone], Fax. [phone]

Canada: PHILIPS SEMICONDUCTORS/COMPONENTS,
Tel. [phone], Fax. [phone]

China/Hong Kong: 501 Hong Kong Industrial Technology Centre,
72 Tat Chee Avenue, Kowloon Tong, HONG KONG,
Tel. [phone], Fax. [phone]

Colombia: see South America
Czech Republic: see Austria
Denmark: Sydhavnsgade 23, 1780 COPENHAGEN V,

Tel. [phone], Fax. [phone]
Finland: Sinikalliontie 3, FIN-02630 ESPOO,

Tel. [phone], Fax. [phone]
France: 51 Rue Carnot, BP317, 92156 SURESNES Cedex,

Tel. [phone], Fax. [phone]
Germany: Hammerbrookstraße 69, D-20097 HAMBURG,

Tel. [phone], Fax. [phone]

Hungary: see Austria
India: Philips INDIA Ltd, Band Box Building, 2nd floor,

254-D, Dr. Annie Besant Road, Worli, MUMBAI 400 025,
Tel. [phone], Fax. [phone]

Indonesia: PT Philips Development Corporation, Semiconductors Division,
Gedung Philips, Jl. Buncit Raya Kav.99-100, JAKARTA 12510,
Tel. [phone] ext. 2501, Fax. [phone]

Ireland: Newstead, Clonskeagh, DUBLIN 14,
Tel. [phone], Fax. [phone]

Israel: RAPAC Electronics, 7 Kehilat Saloniki St, PO Box 18053,
TEL AVIV 61180, Tel. [phone], Fax. [phone]

Italy: PHILIPS SEMICONDUCTORS, Via Casati, 23 - 20052 MONZA (MI),
Tel. [phone], Fax [phone]

Japan: Philips Bldg 13-37, Kohnan 2-chome, Minato-ku,
TOKYO 108-8507, Tel. [phone], Fax. [phone]

Korea: Philips House, 260-199 Itaewon-dong, Yongsan-ku, SEOUL,
Tel. [phone], Fax. [phone]

Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, SELANGOR,
Tel. [phone], Fax. [phone]

Mexico: 5900 Gateway East, Suite 200, EL PASO, TEXAS 79905,
Tel. [phone], Fax [phone]

Middle East: see Italy

Netherlands: Postbus 90050, 5600 PB EINDHOVEN, Bldg. VB,

Tel. [phone], Fax. [phone]
New Zealand: 2 Wagener Place, C.P.O. Box 1041, AUCKLAND,

Tel. [phone], Fax. [phone]
Norway: Box 1, Manglerud 0612, OSLO,

Tel. [phone], Fax. [phone]

Pakistan: see Singapore
Philippines: Philips Semiconductors Philippines Inc.,

106 Valero St. Salcedo Village, P.O. Box 2108 MCC, MAKATI,
Metro MANILA, Tel. [phone], Fax. [phone]

Poland: Al.Jerozolimskie 195 B, 02-222 WARSAW,
Tel. [phone], Fax. [phone]

Portugal: see Spain
Romania: see Italy
Russia: Philips Russia, Ul. Usatcheva 35A, 119048 MOSCOW,

Tel. [phone], Fax. [phone]
Singapore: Lorong 1, Toa Payoh, SINGAPORE 319762,

Tel. [phone], Fax. [phone]

Slovakia: see Austria
Slovenia: see Italy
South Africa: S.A. PHILIPS Pty Ltd., 195-215 Main Road Martindale,

2092 JOHANNESBURG, P.O. Box 58088 Newville 2114,
Tel. [phone], Fax. [phone]

South America: Al. Vicente Pinzon, 173, 6th floor,
04547-130 SÃO PAULO, SP, Brazil,
Tel. [phone], Fax. [phone]

Spain: Balmes 22, 08007 BARCELONA,
Tel. [phone], Fax. [phone]

Sweden: Kottbygatan 7, Akalla, S-16485 STOCKHOLM,
Tel. [phone], Fax. [phone]

Switzerland: Allmendstrasse 140, CH-8027 ZÜRICH,
Tel. [phone] Fax. [phone]

Taiwan: Philips Semiconductors, 6F, No. 96, Chien Kuo N. Rd., Sec. 1,
TAIPEI, Taiwan Tel. [phone], Fax. [phone]

Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd.,
209/2 Sanpavuth-Bangna Road Prakanong, BANGKOK 10260,
Tel. [phone], Fax. [phone]

Turkey: Yukari Dudullu, Org. San. Blg., 2.Cad. Nr. 28 81260 Umraniye,
ISTANBUL, Tel. [phone], Fax. [phone]

Ukraine: PHILIPS UKRAINE, 4 Patrice Lumumba str., Building B, Floor 7,
252042 KIEV, Tel. [phone], Fax. [phone]

United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes,
MIDDLESEX UB3 5BX, Tel. [phone], Fax. [phone]

United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409,
Tel. [phone], Fax. [phone]

Uruguay: see South America
Vietnam: see Singapore
Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD,

Tel. [phone], Fax.[phone]

Printed in The Netherlands 545004/01/pp80 Date of release: 1999 Oct 27 Document order number: 9397 750 05048