Datasheet STV5730 Datasheet (SGS Thomson Microelectronics)

MULTISTANDARD ON-SCREEN DISPLAY

FOR VCR, PAY-TV, SATELLITE RECEIVER

.

A CHARACTER GENERATOR WITH ASCII
RAMANDCHARACTER ROM :

- 128characters

- 12 dots x 18 lines charactercomposition

- 11rows x 28 characterspagecomposition

.

ACCURATE INTERNAL BANDGAP VOLTAGE
REFERENCE

.

LINELOCKEDPLL

.

VIDEOTIMINGGENERATOR

.

INPUT CVBS CLAMP AND SYNC EXTRAC­TOR

.

VERTICALSYNCSEPARATOR

.

INPUTCVBS SYNC RE-INSERTION

.

INPUTCVBS PRESENCEDETECTOR

.

PAL/NTSCCHROMAENCODER

.

DEDICATED PINSFORLUMAANDCHROMA
EXTERNALFILTERING

.

GAIN ON CVBS OUTPUT FOR EITHER 0dB
OR 6dB CAPABILITY

.

MULTISTANDARD TRANSLUCENT MIXED
MODE

.

OPAQUEMIXED MODE

.

NORMALFULL PAGEMODE

.

VIDEOFULLPAGE MODE

.

SUITABLEFORS-VHS

.

THREE DIFFERENT MARKERS CAN BE
GENERATED SIMULTANEOUSLY

.

THREE WIRE SERIAL INTERFACE FOR MI­CROPROCESSORCONTROL

DESCRIPTION

The STV5730 IC is intended to be used in VCR,
SatellitereceiverandPAY-TVsystemsfor CVBSor
R/G/Btext/graphicsinsertion.

(Plastic Micropackage)

ORDER CODE : STV5730

PIN CONNECTIONS

YOUT

VIDEO IN

RES

FTR
AV
DV

CSYNC

XTAL IN

XTAL OUT

MUTE

DATA

CLK

CSN

DD

1
2
3
4
5
6

DD

7
8
9
10
11
12
13
14

R

SO28

STV5730

ADVANCE DATA

28

YIN

27

VIDEO OUT1

26

VIDEO OUT2

25

CIN

24

COUT

23

LESCREEN

22

LECHAR

21

AGND

20

DGND

19

BAR

18

CO

17

FB

16

B

15

G

5730-01.EPS

October 1994

This is advance informationon anewproduct now in developmentor undergoingevaluation. Detailsare subjectto changewithout notice.

1/19

STV5730

PIN DESCRIPTION

o

N

1 YOUT Analog Output This pin outputs the luma to allow the user to notch filter it. This pin may be

2 VIDEO IN Analog Input This is the CVBS input. An external capacitor is needed for clamp operation.

3 RES Analog Pin it must be tied to an external resistor to control the PLL f0 frequency.
4 FTR Analog Pin it must be tied to the line PLL loop filter.
5AV
6DV
7 CSYNC Bidirectional

8 XTAL IN Digital Input This is the 4*fsc quartz input. The quartz may be started or stopped under

9 XTAL OUT Digital Output This is the 4*fsc quartz output. The quartz may be started or stopped under

10 MUTE Digital Output This pin indicates if the CVBS input signal is present on VIDEO IN input pin.

11 DATA Digital Input This is the serial interface data input.
12 CLK Digital Input This is the serial interface clock input.
13 CSN Digital Input This is the serial interface chip selectinput.
14 R Digital Output This is the Red signal output. It is forced low during the horizontal and vertical

15 G Digital Output This is the Green signal output. It is forced low during the horizontal and

16 B Digital Output This is the Blue signal output. It is forced low during the horizontal and vertical

17 FB Digital Output This is the fast blanking output. It is delivered to control an external R/G/B
18 CO Digital Output This is the character activity output. It indicates ifa character foreground is

19 BAR Digital Input This input forces the PLL in free run mode when active. It is enabled ifthe M0
20 DGND Supply Pin 0V digital ground.

21 AGND Supply Pin 0V analog ground.
22 LECHAR Analog Input This pin determines the character intensity level in external bias mode (ie

23 LESCREEN Analog Input This pin determines the screen intensity level in external bias mode (ie when

24 COUT Analog Output This pin outputs the full page mode chromafor external filtering (and

25 CIN Analog Input This pin inputs the filtered chroma.
26 VIDEO OUT2 Analog Output If the M7 mode bit is cleared : this pin is a CVBS output that delivers the

27 VIDEO OUT1 Analog Output This is a CVBS output. It delivers the VIDEO IN + text in mixed mode and the

28 YIN Analog Input This pin inputs the notch filtered luma.

Name Type Description

connected to the YIN input for minimum cost applications.

The STV5730 extracts the sync from this signal when the C7 control bit is set.

DD
DD

Supply Pin 5V analog supply pin.
Supply Pin 5V digital supply pin.

This pin inputs the mixed mode composite sync when the C7 control bit is

Pin

cleared. It outputs the video in extracted sync when the C7 control bit is set.

control of dedicated serial interface messages. Alternatively, a 4fsc clock can
be input directly. The stop message must not be used in this case.

control of dedicated serial interface messages.

It is forced low if the M2 mode bit is cleared.

blanking intervals.
vertical blanking intervals.

blanking intervals.

switch for R/G/B or TV applications.

being displayed, and can be used to control its intensity.

mode bit is set.

when the C10 control bit is set). This level mustbe defined relative to the
internal black reference. A variable luminance signal may be entered. To be
grounded if not used.

the C10 control bit is set). This level must be defined relative to the internal
black reference. A variable luminance signal may be entered. To be grounded
if not used.

attenuationif necessary). This pin may be connected to CIN for minimum cost
applications.

VIDEO IN signal. The sync is re-inserted if the M4 mode bit is set. The output
amplitude may be either 0dBor +6dB according to the M5 mode bit.
If the M7 mode bit is set : It outputs the currently active synchronism. The
signal amplitude is controlled by the M5 mode bit.
If the M8 mode bit is cleared : VIDEO OUT2 is in high impedance state.

CVBS text in full page mode. The output signal amplitude may be either 0dB
or 6dB according to the M5 mode bit. The sync is re inserted if the M4 mode
bit is set.

5730-01.TBL

2/19

BLOCK DIAGRAM

STV5730

VIDEO

CSYNC

BAR

AV

DV
AGND
DGND

IN

DD

DD

CLAMP

2

7

19

5
6

21

20

LINE LOCKED

COMPOSITE

SYNC

EXTRACTION

PLL

YIN CIN

28 25

SYNC

INSERTION

VERTICAL

SYNC

SEPARATION

PLXCLK

CONTROL

SERIAL BUS

INTERFACE

11 1312 1043

INSERTION

H AND V

SCANNING

VIDEO

DETECTOR

MUTECSNCLKDATARESFTR

TEXT

GENERATOR

ASCII

RAM

RAM

ADDRESS

GAIN

DISABLE

CHARACTER

ROM

LUMA & SYNC
GENERATION

BIAS LEVEL

GENERATION

PAL/NTSC

ENCODER &

SATURATION

COLOR

LOGIC

STV5730

VIDEO

27

OUT1

VIDEO

26

OUT2

XTAL

8

IN
XTAL

9

OUT
COUT

24

14

R

15

G

16

B
FB

17
18

CO
YOUT

1

LECHAR

22

LESCREEN

23

5730-02.EPS

ABSOLUTE MAXIMUMRATINGS

Symbol Parameter Value Unit

DV
AV

DD
DD

T

Digital Supply Voltage 7 V
Analog Supply Voltage 7 V
Junction Temperature 150

j

THERMALDATA

Symbol Parameter Value Unit

R

th (j-a)

Junction-ambient Thermal Resistance Typ. 70

o

C/W

o

C

3/19

5730-02.TBL

5730-03.TBL

STV5730

ELECTRICAL CHARACTERISTICS (TA=0oCto70oC,AVDD=DVDD=5V,unless otherwisespecified)

Symbol Parameter Min. Typ. Max. Unit

DV

DD

DI

DD

AV

DD

AI

DD

AV

-DVDDAnalog to Digital Supply Voltage Difference -200 0 200 mV

DD

DV

OH

DV

DV

DV

DI

IH

DI

IL

BW Bandwidth at pins : VIDEO IN, VIDEO OUT1,

VIDEO IN (Pin 2)

V

SYNCIN

V

CL

C

IN

VIDEO OUT1(Pin 27)

V

OUT1

C

L1

R

L1

Z

OUT1

VIDEO OUT2(Pin 26)

V

OUT2

C

L2

R

L2

Z

OUT2

GAIN (Pins 26- 27)

CIN (Pin 25)

C

CIN

R

CIN

YIN (Pin 28)

C

YIN

YOUT (Pin 1)

V

YOUT

C

LYOUT

R

LYOUT

COUT (Pin 24)

V

COUT

C

LCOUT

R

LCOUT

Digital Supply Voltage DVDD- DGND 4.75 5.0 5.25 V
Digital Supply Current 10 mA
Analog Supply Voltage 4.75 5.0 5.25 V
Analog Supply Current 25 mA

Digital Output Voltage High Level (I
Digital Output Voltage Low Level (I

OL

Digital Input Voltage High Level 0.75 x

IH

Digital Input Voltage Low Level 0.15 x

IL

= -1mA) DVDD-0.5 V

LOAD

= +1mA) DGND + 0.5 V

LOAD

- DGND)

(DV

DD

(DV

DD

Digital Input Current High Level 1
Digital Input Current Low Level -1 µ

8.0 MHz

VIDEO OUT2, CIN, YIN, YOUT, COUT

Sync Pulse Range 100 650 mV
Clamp Voltage 1.10 1.25 1.4 V
External Capacitor 2.2 µ

Output Dynamic Range 2.0 4.4 V
Black Level Voltage 2.6 2.85 3.1 V
Output Capacitor Load 20 pF
Output Resistor Load 10
Output Impedance 250 Ω

Output Dynamic Range 2.0 4.4 V
Black Level Voltage 2.6 2.85 3.1 V
Output Capacitor Load 20 pF
Output Resistor Load 10
Output Impedance 250 Ω

Gain Dispersion 0dB

6dB

-1
5

0
6

Input Capacitance 0.5 pF
Input Resistance 50

Input Capacitance 0.5 pF

Output Dynamic Range 0.5 3.5 V
Output Capacitor Load 15 pF
Output Resistor Load 10

Output Dynamic Range 0.5 3.5 V
Output Capacitor Load 15 pF
Output Resistor Load 10

- DGND)

+1

7

V

V

µA

kΩ

kΩ

dB
dB

kΩ

kΩ

kΩ

A

F

5730-04.TBL

4/19

STV5730

ELECTRICAL CHARACTERISTICS (TA=0oCto70oC,AVDD=DVDD=5V,unless otherwisespecified)

(continued)

Symbol Parameter Min. Typ. Max. Unit

LESCREEN (Pin 23)

V

LESCR

LECHAR (Pin 22)

V

LECH

INTERNAL SIGNAL LEVELS (Pins 1- 24)

V

SYNC

V

BLACK

V

SCREEN

V

CHAR

∆V1
∆V2
∆V3

V

BURSTPP

V

CH1PP

V

CH2PP

BUS (Pins 11- 12 - 13)

f

CLK

t

CWL

t

CWH

t

CSWL

t

CSWH

t

DCLH

t

CLD

t

CLCSL

t

CSLCLL

t

CLHCSH

t

CSHCL

* maxHZ is the maximum horizontal zoom factor that isused

InputLevel 1.0 3.0 V

InputLevel 1.0 3.0 V

Internal Sync Level 0.95 V
Internal Black Level 1.1 1.25 1.4 V
Internal LESCREEN 1.4 V
Internal LECHAR 1.8 V
Difference Level between Black and Sync Level 250 300 350 mV
Difference Level between Screen and Black Level 100 150 200 mV

Difference Level between Char. and Screen Level 360 410 460 mV
Burst Amplitude 360 mV
Chroma Amplitude for blue or yellow colors

for red, magenta, green or cyan colors

360
520

mV
mV

CLK Frequency Range 0 2 MHz
CLK Width Low 200 ns
CLK Width High 200 ns
CSN Width Low maxHZ* x 4
CSN Width High maxHZ* x 4 µ

µs

s
DATA Valid to CLK High 100 ns
CLK High to DATA Unvalid 100 ns
CLK Valid to CSN Low 100 ns
CSN Low to CLK Low 100 ns
CLK High to CSN High 100 ns
CSN High to CLK Unvalid 100 ns

PP
PP

PP

5730-05.TBL

Figure1

DATA

CLK

t

CLCSL

CSN

t

DCLH

t

CSLCLL

t

t

CLD

t

CSHCL

t

CWL

t

CSWL

t

CWH

t

CLHCSH

t

CSWH

CLCSL

5730-03.EPS

5/19

STV5730

TYPICAL PAL/NTSC/SECAM APPLICATION

LUMA FILTER (see Note 1)

CVBS IN

(seenote 4)

Ω

4.3k

220pF

CSYNC

(IN or OUT)

Ext. 4 fsc

OSC IN

(see Note 2)

TO MICRO

22kΩ

+5V

22nF

XTAL

x 4fsc

2.2µF

10µH

220nF

39pF

39pF

BAT42

220nF

1
2
3
4
5
6
7
8
9

10
11
12
13
14 15

S

T

V

5
7
3
0

TRANSLUCENTMODE

R1

+5V

68Ω

CVBS OUT

28
27
26
25
24
23
22
21
20
19
18
17
16

+5V

CHROMA TRAP

(see Note 3)

68Ω

+5V

Ω

180

+5V
+5V

180Ω

CHROMA BP FILTER

(see Note 1)

68Ω

+5V

180Ω

68Ω

+5V

180Ω

EXTERNAL
RGB
TEXT
INSERTION
(SCART)

68Ω

Digital Ground

AnalogGround

Notes : 1. Optional filter.For low cost applications, short circuit.

2. The 4fsc (17.734MHz PAL,14.318MHz NTSC) crystal may be ommited if this signal is already available in a system.

3. External bias level can be setby resistor ratioas required. The level at pinsLECHAR and LESCREEN must not exceed 3.0 Vdc.

180Ω

4. Output impedance of the driving stage should be less than 300Ω.

6/19

5730-04.EPS

FUNCTIONALDESCRIPTION

The STV5730 operates in ”mixed mode” or ”full
page mode” :

- Mixed mode : the device is line locked to the
incomingCVBS signal.The textissuperimposed
overtheCVBSinputeitherin B&Wortranslucent.
Itmayalsobesuperimposedin colorby usingthe
R/G/B outputs.

- Full pagemode:the device generatesa colored
PAL or NTSC CVBS output and simultaneous
R/G/Boutputs.Both”normalfullpage”and”video
full page”modesare supportedby the STV5730.
In the ”normal full page”the screen background
is uniformely colored, while the ”video full page”
mode permits todisplay the unlocked VIDEO IN
signalin the screenbackgroundarea.

It performsthe followingtextfeatures:

- Page composition: 11rows X28 characters

- Number of displayedcharacters: 308(max)

- Character composition:12 dots X 18 lines

STV5730

- ROMcharacterset: 128userdefinabl echarac ters

- Screendisplaypositions:58 horizontalpositions,
63 verticalpositions

- Rowpositionoffset , each row : Xoffsetfrom0 to
+15,Yoffsetfrom -17 to +17

- Display enable : each row or page

- Charactercolor : 1 outof 8, each character

- Characterbackgroundcolor:1outof8,character
and page enabled or set identical to character
color

- Characterbordercolor : 1 outof 8,row enabled
or set identicalto character color

- Pagebackgroundcolor : 1 out of 8

- Zoom:3 independantzoomfactorsfor rows0,
1 to 9 and10.

- Zoom factors : four independantX and Y zoom
factors

- Blink: characterand page enabled

- Blinkfrequency : 0.5 or 1.0 second

- Blinkduty cycle : 0.25,0.5 or 0.75

1 - THE INTERNAL RAM BUFFER

It storesthe page (i.e. the text definition)andthe row attributes.

1.1 - Page

The page includes 11 row buffers, numbered from 0 to 10. Each row buffer includes 28 characters,
numberedfrom0to27. Thecharactersmaybewrittenonebyonebythemicroprocessorforrandomaccess.
They also may be writtensequentially, startingwith any character address.

1.2 - Character Formatand Attributes

11 10 9 8 7 6 0

BE R G B BK CHARACTER CODE

CHARACTER CODE : 1 characterout of 128 from the characterROM
BK : BK=0 : characterblink disabled

BK=1 : characterblink enabled

R/G/B : Charactercolor :

BE : BE=0 :

BE=1 :

000
001
010
011
100
101
110
111

the character backgroundis disabled

thecharacterbackground is enabled

black
blue
green
cyan
red
magenta
yellow
white

7/19

STV5730

1.3 - Row Attributes

Thereare 11row attributes,numberedfrom0 to10. They may be written one by one or sequentially.
The row attribute formatis as follows :

11 8765 0

HPOS OFFSET RE FBE VPOS OFFSET

VPOS OFFSET : theMSBisthesign bit (0 : positive,1 :negative).Ifthe offsetis positive(from 0 to +17),

then the corresponding number of lines are added on top of the row (i.e. it moves
downwards). These extra lines are colored according to the character background
rules.If the offsetis negative (from -1 to -17), then the correspondingnumber of lines
are subtractedfromthe display of the row.

FBE : FBE=0 : the charactersare displayedwithout border

FBE=1: the characters are displayed with border

RE : RE=0 :

RE=1 :

HPOSOFFSET : The displayoftherowisshifted totherightbythe correspondingnumberof pixels(from

0 to15).

1.4 - The Control Registers

Thereare 5 registers formicroprocessor control.They can be writtenindividuallyorsequentially:

- the ZOOM register address : 12

- the COLOR register 13

- the CONTROLregister 14

- the POSITIONregister 15

- the MODE register 16

the characters of the roware not displayed.
They are replacedby the page backgroundcolor.
the characters of the roware displayed.

1.4.1 - Zoom Register

11109876543210

VZb1 VZb0 HZb1 HZb0 VZm1 VZm0 HZm1 HZm0 VZt1 VZt0 HZt1 HZt0

HZt[1:0] : Top row horizontalzoomfactor(ierow 0)

HZt[1:0] = 00

:

1 pixel per character dot

01

:

2 pixelsper characterdot

10

:

3 pixelsper characterdot

11

:

4 pixelsper characterdot

VZt[1:0] : Top row vertical zoom factor

VZt[1:0] = 00

:

1 pixel per character line

01

:

2 pixelsper characterline

10

:

3 pixelsper characterline

11

:

4 pixelsper characterline
HZm[1:0] : Same as HZt[1:0],for middlerows (ie rows 1 to 9)
VZm[1:0] : Same as VZt[1:0],for middle rows
HZb[1:0] : Same as HZt[1:0],for bottomrow (ie row 10)
VZb[1:0] : Same as VZt[1:0],for bottom row

The outputofthisregister is synchronizedby the horizontalsynchronism.TheRESETmessage clearsthis
register.

8/19

STV5730

1.4.2 - Color Register (pageattributes)

11109876 210

R G B R G B // // // R G B

SBC FBC BCC

SBC : screenbackgroundcolor
FBC : character bordercolor
BCC : characterbackgroundcolor

The output of this register is synchronizedby the horizontalsynchronism.

1.4.3 - Control Register

11109876543210

C11 C10 C9 C8 C7 C6 C5 C4 C3 C2 C1 C0

C0 : C0 = 0 :mixed mode

C0 = 1 : full page mode

C1 : C1 = 0 :the character backgroundis controlledby BE (seecharacterword description)

C1 = 1 : all displayed character backgroundsare disabled

C2 : C2 = 0 :display off

C2 = 1 : display on

C3 : C3 = 0 :the charactersare coloredaccordingto the character attributeand the color register

values(i.e. CBACKGand CBORD)

C3 = 1 : the character foreground,borderandbackgroundcolorsare all set to the character

attributevalue (see paragraph1.2).This option is mainlyintendedforfull page mode,
CVBSor Y/Coutput

C4 : C4 = 0 :1.0 second blinking period

C4 = 1 : 0.5 second blinking period

C[6:5] : C[6:5] = 00

C7 : C7 = 0

C7 = 1

an external input compositesync is taken from the CSYNC pin
the sync is extracted by the STV5730.The currently active sync is output on the
CSYNCpin

C8 : C8 = 0 :the standardis NTSC, 60Hz

C8 = 1 : the standardis PALor SECAMwith M6 = 0, 50Hz

C9 : C9 = 0 :character color encodingis disabled

C9 = 1 : character color encodingis enabled

C10 : C10 = 0 : the luminancelevelsare generatedinternally

C10 = 1 : the luminance levels are providedbythe LESCREENand LECHARinput pins.

C11 : C11= 0 : VideoFull Page Mode. A stable full page mode text is displayed while the screen

C11= 1 : Normalfull pagemode is active.

The outputofthisregisteris synchronizedbythehorizontalsync (exceptC7).The RESETmessageclears
this register.

:

blinkingoff

01

:

0.75 blinking duty cycle

10

:

0.5 blinking duty cycle

11

:

0.25 blinking duty cycle

background is the unlocked video input signal.

9/19

STV5730

1.4.4 - Position Register

11 6 5 0

VERTICAL POSITION HORIZONTAL POSITION

HORIZONTALPOSITION Anyvaluefrom 6 to 63
VERTICALPOSITION Any value from 1 to63

1.4.5 - Mode Register

11109876543210

M11 M10 M9 M8 M7 M6 M5 M4 M3 M2 M1 M0

M0 : M0 = 0

M0 = 1::

M1 : M1 = 0

M1 = 1::

M2 : M2 = 0

M2 = 1::

M3 : M3 = 0

M3 = 1::

M4 : M4 = 0

M4 = 1::

M5 : M5 = 0

M5 = 1::

M6 : M6 = 0

M6 = 1::

M7 : M7 = 0

M7 = 1::

M8 : M8 = 0

M8 = 1::

the BAR pin is disabled
the BAR pin has an action on the line PLL

the missing sync pulses are not detected
the missing sync pulses are detected

the MUTE pin is forced to 0
the MUTE pin deliverstheinternalMUTEsignal

the MUTE time constant is 8 lines
the MUTE time constant is 32 lines

the sync is not re-inserted
the sync is re-insertedforimprovedtext stability

the gain of pins VIDEO OUT1 & VIDEO OUT2 is 0dB.
the gain of pins VIDEO OUT1 & VIDEO OUT2 is 6dB.

the color encoder is enabled (PALor NTSC)
the color encoder is disabled(B&W or SECAM)

the VIDEOOUT2 pin outputs the VIDEOIN signal
the VIDEOOUT2 pin outputs the composite sync

the VIDEOOUT2 pin is in high impedancestate

the VIDEOOUT2 pin is in low impedancestate
M9 : This Mode bit has to be keptat a lowlevel.
M10 : M10 = 0

M10 = 1::

M11 : M11=0

M11 = 1::

No delaycompensation

It enables the delay compensationof the internalsync extractor.

The mute signal output is synchronizedon vertical sync in order to limit its transitions.

The mute signal is not synchronized on vertical sync thus accelerating the VIDEO IN

presencedetection(useful in full page mode).

2 - THE MICROPROCESSOR SERIALINTERFACE

The STV5730 is down loaded by the microprocessor through a three wire serial interface : DATA, CLK,
CSN. TheCLK andCSNsignalsareinternallyORed in order to validate the transferwhenthe STV5730 is
chipselectedonly(i.e. CSN = 0). The CSN rising edge validates theinternal data transfer.

2.1 - MessageFormats (seeFigure2)
16-bit,8-bit and 0-bit formats are available. The 8-bit and 0-bit message formatsmay be useful to speed
up the STV5730 down loading.

15 1211 87654 0

0000 BUF[11:8] STRU[7:6] 0 DEPL[4:0] ADDRESS

This16-bitaddressmessageloads theserial interfacewritepointer.This addressisincrementedaftereach
data message.

15 12 11 0

0001 DATA[11:0] DATA

This 16-bitdata messagewrites the data at the location indicatedby the write pointer.

10/19

STV5730

70

DATA[7:0] DATA

This 8-bit data messagewrites the data at thelocationindicatedby the write pointer. The 4-bit data MSB
is copied from thelastprevious16-bitdata message.
The 0-bit data message writes a dataat the location indicated by the write pointer.The lastdata is used
fromthe previous8-bit or 16-bit data message.

15 12 11 0

0010 don’t care CONTROL

This 16-bitcontrol message stopsthe 4*fsc quartz oscillator.

15 12 11 0

0011 don’t care CONTROL

This 16-bit control message resets the circuit and starts the 4*fsc quartz oscillator. This message should
not be usedif an external4 x fsc clockis used instead of the quartz.Itis mandatorythatreset operationis
as describedin paragraph2.3.

Figure 2

15 14 13 12 2 1 0

DATA

CLK

CSN

76543210

DATA

CLK

CSN

DATA

CLK

CSN

2.2 - The Write Pointer

As describedin the ”message format” paragraph,
an address consists of three fields : STRU[7:6],
BUF[11:8],DEPL[4:0].
The STRU[7:6] fieldindicateswhether it is a PAGE
address or a ROW ATTRIBUTE / REGISTERad­dress. It also determines the address incrementa­tionscheme.

- STRU[7:6] = 00:

It is a PAGE address. BUF provides the row
number (from 0 to 10) and DEPL provides the
characternumber (from 0 to 27). DEPLis incre-

16-BIT

MESSAGE

8-BIT

MESSAGE

0-BIT

MESSAGE

mentedaftereachdatamessage.Whenthe write
of a row is completed, the write pointeris auto­maticallysetto the next row first character.

- STRU[7:6] = 01 :
It is also a PAGE address buttheincrementation
schemeisa bit different: whenthewrite of arow
iscompleted,thewritepointerisautomaticallyset
to the first characterof the same row.

- STRU[7:6] = 11 :
Itis arowattributeoraregisteraddress.TheBUF
field must be set to 0000 and the DEPL field is
incrementedafter eachdata access.

5730-05.EPS

11/19

STV5730

2.2.1 - Address Map

PAGE : ROW0 : STRU[7:6] = 0 or 1 -BUF[11:8] = 0 - DEPL[4:0]from 0 to 27

ROW1 : STRU[7:6] = 0 or 1 - BUF[11:8]= 1 - DEPL[4:0]from0 to 27

......... : ................. ..................... ................

ROW10 : STRU[7:6]= 0 or 1 - BUF[11:8]= 10 - DEPL[3:0]from0 t0 27
ROWATTRIBUTES : STRU[7:6]= 11- BUF[11:8]= 0 - DEPL[4:0]from 0 to 10
REGISTERS : STRU[7:6]= 11- BUF[11:8] = 0

DEPL[4:0]= 12 for ZOOM register,13 for COLOR register,

14 for CONTROL register,15 for POSITIONregister,
16 for MODE register

2.3 - Initializationand Down-loadingSequence

It is important that the STV5730is correctly reset
and initialized after the circuit is powered prior to
anywriting. This routine is shownin Figure 3. The
two initializationbytes (00db 1000) must procede
theresetinstruction(x2)everytimeitistransmitted.

Figure3

RESET & INITIALIZE

3000H
3000H
00dbH
1000H

Set Control Registers

* Zoom
* Color
* Control
* Position
* Mode

Set Row Attributes

* 0 to 10

Set RAM Attributes

i.e. TEXT PAGE

* Write Pointer
* Data
* etc.

Next Page

Write

STOP

bytheSTV5730(if C7controlbit isset)orprovided
by the application in a composite form on the
CSYNC pin (if C7 control bit is cleared). The
STV5730separatestheverticalsync fromthecom­posite synchronism.
The STV5730 PLL features built-in protection
mechanismsagainstmissingandparasitichorizon­tal sync pulses. These mechanisms are activated
once the loop is locked.
The STV5730 PLL is also insensitive to the head
switching disturbing the synchronism in the VTR
applications(playback).
Themissingpulsesmaybe detected.The M1mode
bitenables the detection.

In addition, the BAR input pin is available to enter
a signal that forces the PLL in free run mode.This
capabilitymay be used for search mode in VTRs,
to improve the loop robustness against the noise
bar.The BAR inputis enabledby the M0 mode bit.

3.2 - Horizontal SyncRe-insertion

This mechanism is of interest in mixed mode, to
cancelthetexthorizontaljitterwhenthesyncsignal
is too bad. It is activated by the M4 mode bit and
must be turned off in full page mode.

The active part of the line is protected against
parasiticsyncinsertion.Themodifiedsyncisactive
on all output pins (ie CSYNC if C7 is set, VIDEO
OUT1,VIDEO OUT2).

Ajitter greaterthan 0.42useccannotbecancelled.
Anease useof thesynchronismre-insertion capa-

bilityis to have it always active in mixed mode.

3.3 - FullPage Mode Behavior

Inthiscase,thePLLislockedon aninternal64usec
referencederived from the 4*fsc quartz.

TheSTV5730generatesa noninterlace output.

5730-14.EPS

3 - THE LINE LOCKEDPLL

The PLLfrequencyis 504* f

= 7.875MHz.

H

3.1 - Mixed Mode Behavior

In mixedmode,theinternalPLLisline lockedto the
incomingCVBSsignal.Thesynciseither extracted

12/19

4 - MUTE

The STV5730 monitors the sync to determine
whetherit is a stable signal or not.

MUTE = high : no stable signal
MUTE = low : stable CVBS input signal

STV5730

The MUTE search time constant may be either
8 linesor 32 lines,accordingto theM3 modebit.
The signal thatisdelivered to the MUTEoutputpin
is synchronized on the vertical sync if M11 is
cleared. It is forced low if the M2 mode bit is low.
This signalmay be monitoredby the microproces­sor to switchtheSTV5730frommixed mode to full
page mode and vice versa (using the C0 control
bit).

5 - THE LUMA GENERATION

Thelumasignalis generatedbytheSTV5730from
timing information created by the character and
video timinggeneratorsand voltagelevelscreated
by the internalbias level generator or enteredon
the LESCREENandLECHAR pins(as selectedby
the C10 control bit).
The luma signalisoutputon the YOUTpintoallow
the user to notch filter it. It is then re-input on the
YINpin.YOUT andYINmaybeconnectedtogether
forminimalcost applications.

5.1 - InternalBiasMode

This mode is intended for minimal cost applica­tions. C10 mustbe cleared. The luma levels of the
OSDoutput signal are as follows :

- LEBLACK : black level

nominalvalue: 1.25V± 20mV

- LESYNC : sync level

nominalvalue: LEBLACK- 300mV

- LESCREEN : page background level

nominalvalue: LEBLACK+ 150mV

- LECHAR : character level

nominalvalue: LEBLACK+ 550mV

LEBLACK is also used to clamp the VIDEO IN
signaland to create the characterborder.

The character encoding is controlled by the C9
controlbit.
The chroma signal is output on the COUT pin for
externalfiltering and for attenuationif necessary.It
isthen re-enteredontheCIN pin and addedto the
YIN pin signal to create the final CVBS output
signal.

The chro ma saturation is controlled by the
STV5730:

- burst nominal amplitude : 360mV

PP

- blu e or yellow colors nominal amplitude :
360mV

PP

- red, magenta, green or cyan colors nominal am­plitude : 520mV

PP

7 - THE MARKERS

TheSTV5730cangenerate3differentmarkersthat
canbe activatedsimultaneously (i.e. on the same
page).

Thefollowingmarkerfeaturesare performed:

- Blinking character,character backgroundoff.
Thecharacterforegroundblinks (BK = 1, BE = 0
or C1 = 1).

- Not blinkingcharacter, characterbackgroundon
(C1 = 0, BE = 1).

- Blinking character,character backgroundon.
Thecharacterforegroundblinks andthe charac­terbackgroundremains(BK = 1, BE=1,C1 =0).

8 - THE TRANSLUCENT MIXED MODE
Figure4 : The Translucent Mixed Mode Output

Configuration

VIDEO OUT1

1

5.2 - ExternalBias Mode

This modeisintendedto givemoreflexibility tothe
user. C10 must be set. The LESCREEN and
LECHAR levels may be user defined relatively to
the internal LEBLACK level. The final luma ampli­tude should not be greater than the peak white
level. These levels may be staticor dynamic. Dy­namic levels can be easily generated by analog
sum ofthe R/G/B andCOSTV5730outputs(a few
resistors are necessary)to givegreyscale charac­ter shading in the mixed mode. C0 is useful to
controlthe characterforegroundluma level.

6 - THE CHROMAGENERATION

The STV5730 encoder is operates in full page
modeonly. It may perform PALor NTSC encoding
accordingtothe C8control bit.
A 4* fsc chroma quartz crystal is necessary
(fsc = 4.43MHz for PAL,3.58MHzfor NTSC).
The encoder can be turned off by the M6 mode bit
forblack & whiteor forSECAMapplications.

R1

S

R2

disable

VIDEO OUT2

STV5730

28

The VIDEO OUT1 and VIDEO OUT2 outputs may
be summed via two external resistors to create a
translucent text (mixed mode). In this case, the
backgroundpicture is still visible behind the text.
The background picture visibility (or level oftrans­lucenceis controlledby the resistorratio.
Another benefit from this function is to allow
PAL/SECAM/NTSC multistandard applications to

13/19

5730-06.EPS

STV5730

be builtwith no SECAM chroma re-insertion filter
and no additional control switches.
ThesummaybecancelledbysettingtheM8 mode
bit. In this case, the VIDEO OUT2 pin is in high
impedancestateand the resistor network delivers
VIDEOOUT1 only.

Whenusing the resistor network, please set M8 in
the followingcases:

- in full page mode

- when OSD in not displayed

- to select opaque text. This allows the viewer to
selectby software the preferreddisplaymode.

The DC levels of theVIDEO OUT1, VIDEO OUT2
and the sum signals are high enough to directly
drivea NPN emitter follower driver (see Table 1).

without colored background.
Presence detectionis permanently active to keep
the microcontroller informed of the input signal
quality. The information is delivered by the MUTE
pin.
Thisinformationcanbeused bythemicrocontroller
to forcetheSTV5730 into the mixed mode (set C0
low) when the input signal becomes goodenough.
In thevideo full page mode, it can be usefull to set
the M11(mode register)bit high, so that the mute
signalis notsynchronizedonthe verticalsync,thus
acceleratingtheVIDEOINpresencedetection.

10 - S-VHS APPLICATION (see Figure 5)
The STV5730 can be used in S-VHS applications

easily.
The Y signal must be delivered to the VIDEO IN

9 - VIDEO FULLPAGE MODE

In additionto the normal fullpage mode in whicha
uniformely colored screen background is gener­ated, the STV5730 is able to support a ”video full
page mode”.
Normal and videofull page mode are selected by
the controlbit C11(respectively set high and low).
By using the video full page mode the channel
capture operation can be easily monitored on the
screen since the signal at the VIDEO IN input is
displayed, unlocked, in the screen background
area ; the text being stable and colored, with or

input. The VIDEO OUT1 output then delivers a
Y +textsignal,whilsttheVIDEOOUT2deliversthe
Y input signal, provided that the CIN input is con­nectedto a bias DC level.
An external switch must be used to select the C
signalin mixed mode or the COUToutputsignalin
full page mode.
In mixedmodethechromasignal (C) canbeexter­nally attenuated(multistandardtranslucentopera­tion) or killed (PAL/NTSC opaque operationonly)
during the character gate controlled by the fast
blankingsignal.

Table 1

FULL PAGE

PAL/NTSC

VIDEO OUT1 CVBS (OSD) VIDEO IN or Text VIDEO IN or Text
VIDEO OUT2 High impedance VIDEO IN High Impedance

S CVBS

(OSD)

TRANSLUCENT PAL/NTSC/SECAM OPAQUE PAL/NTSC

VIDEO IN or

x Text + R1x VIDEO IN

R

2

R

+ R

1

MIXED MODE

VIDEO IN

or Text

2

Figure5 : S-VHS Input/OutputConfiguration

STV5730

12

28

COUTFP2223

INTERNAL BIAS

14/19

Y

VIDEO IN VIDEOOUT1

VIDEOOUT2

CIN

FB

15

CHARACTER

C

GATED

ATTENUATOR

R

1

R

2

OPTIONAL

FILTER

Y

OSD

Y or Text

R

Text

2

*

Yor

R

1

EXTERNAL

MM

SWITCH

Mixed Mode (MM)
Full PageMode (FP)

Full page mode

R

1

R

2

Opaquemixed mode

Y

*

Translucent mixedmode

C

5730-07.EPS

STV5730

11- THE CVBS OUTPUT PICTURE

The following tables show the picture design in CVBS output mode (VIDEOout1 analog output pin)
accordingto:

- Blink on/off (BKcharacterattribute & C[6:5] control bits)

- Character backgroundon/off(BE characterattribute& C1 control bit)

- Character border on/off (FBE row attribute)

11.1- Mixed Mode

CHARACTER

FOREGROUND

Not Blinking and
Char Backg off

Not Blinking and
Char Backg on

Blinking and Char Backg off video
Blinking and Char Backg on LESCREEN video

LECHAR LEBLACK video

LECHAR LEBLACK LESCREEN video

11.2- Full Page Mode

CHARACTER

FOREGROUND

Not Blinking and
Char Backg off

Not Blinking and
Char Backg on

Blinking and Char Backg off LESCREEN + CSCREEN
Blinking and Char Backg on LESCREEN + CBACKG LESCREEN +

LECHAR +

CCHAR

LECHAR +

CCHAR

CCHARis a characterattribute.
C3 = 0 : CSCREEN,CBACKG and CBORD are page attributes,definedby the color register.
C3 = 1 : CSCREENis defined by the colorregister. CBACKGand CBORD are identical to CCHAR and

thus are characterattributes.

CHARACTER

BORDER

if on

CHARACTER

BORDER

if on

LEBLACK +

CBORD

LEBLACK +

CBORD

CHARACTER

BORDER

if off

CHARACTER

BORDER

if off

LESCREEN + CBACKG LESCREEN +

CHARACTER

BACKGROUND

CHARACTER

BACKGROUND

LESCREEN + CSCREEN

BACKGROUND

BACKGROUND

CSCREEN

CSCREEN

PAGE

PAGE

15/19

STV5730

12 - THE R/G/B OUTPUT PICTURE

The followingtablesshow the picture design in R/G/B outputmode,accordingto :

- Blink on/off (BKcharacterattribute & C[6:4] control bits)

- Character backgroundon/off(BE characterattribute& C1 control bit)

- Character border on/off (FBE row attribute)

- C3 = 0 : CSCREEN,CBACKG and CBORDare page attributes,definedby the color register.

- C3 = 1 : CSCREENisdefinedby the colorregister.CBACKGand CBORDareidenticalto CCHARand

thus are characterattributes.Itis recommendedto useCO output signal in this case.

AR/G/Bexternalswitch must be controlledby the STV5730 FB output to perform the characterinsertion.
C0 may be used as an additionalcharacterintensitysignal.

12.1 - Mixed Mode

CHARACTER

FOREGROUND

Not Blinking and
Char Backg off

Not Blinking and
Char Backg on

Blinking and Char Backg off video
Blinking and Char Backg on CBACKG video

CCHAR CBORD video

CCHAR CBORD CBACKG video

12.2 - Full Page Mode

CHARACTER

FOREGROUND

Not Blinking and
Char Backg off

Not Blinking and
Char Backg on

Blinking and Char Backg off CSCREEN
Blinking and Char Backg on CBACKG CSCREEN

CCHAR CBORD CSCREEN

CCHAR CBORD CBACKG CSCREEN

CCHARis a characterattribute.
C3 = 0 : CSCREEN,CBACKG and CBORD are page attributes,definedby the color register.
C3 = 1 : CSCREENis defined by the colorregister. CBACKGand CBORD are identical to CCHAR and

thus are characterattributes.

CHARACTER

BORDER

if on

CHARACTER

BORDER

if on

CHARACTER

BORDER

if off

CHARACTER

BORDER

if off

CHARACTER

BACKGROUND

CHARACTER

BACKGROUND

PAGE

BACKGROUND

PAGE

BACKGROUND

16/19

STV5730

13 - STANDARD CHARACTERS

The default device is delivered with a standard set of ROM based characters(see Figure 6) and masked
pin polarities.

The user can redefine the total character set (except for the character 0 (zero)).

Figure6

00H 01H 02H 03H 04H 05H 06H 07H

08H 09H 0AH 0BH 0CH 0DH 0EH 0FH

10H 11H 12H 13H 14H 15H 16H 17H

18H 19H 1AH 1BH 1CH 1DH 1EH 1FH

20H 21H 22H 23H 24H 25H 26H 27H

28H 29H 2AH 2BH 2CH 2DH 2EH 2FH

30H 31H 32H 33H 34H 35H 36H 37H

38H 39H 3AH 3BH 3CH 3DH 3EH 3FH

5730-12.EPS

17/19

STV5730

Figure 6 (continued)

40H 41H 42H 43H 44H 45H 46H 47H

48H 49H 4AH 4BH 4CH 4DH 4EH 4FH

50H 51H 52H 53H 54H 55H 56H 57H

58H 59H 5AH 5BH 5CH 5DH 5EH 5FH

60H 61H 62H 63H 64H 65H 66H 67H

68H 69H 6AH 6BH 6CH 6DH 6EH 6FH

70H 71H 72H 73H 74H 75H 76H 77H

78H 79H 7AH 7BH 7CH 7DH 7EH 7FH

5730-13.EPS

18/19

PACKAGE MECHANICAL DATA

28 PINS - PLASTICMICROPACKAGE

STV5730

L

C

A

c1

Dimensions

b

e3

D

28 15

114

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

e

s

F

a1

E

b1

A 2.65 0.104

a1 0.1 0.3 0.004 0.012

b 0.35 0.49 0.014 0.019

b1 0.23 0.32 0.009 0.013

C 0.5 0.020

c1 45

o

(typ.)
D 17.7 18.1 0.697 0.713
E 10 10.65 0.394 0.419

e 1.27 0.050

e3 16.51 0.65

F 7.4 7.6 0.291 0.299

L 0.4 1.27 0.016 0.050

S8

o

(max.)

PM-SO28.EPS

SO28.TBL

Information furnished is believed to beaccurate andreliable. However, SGS-THOMSON Microelectronicsassumes no responsibility
for the consequences of useof such information norfor any infringement ofpatents or otherrights of third parties which may result
from itsuse. Nolicence is granted by implication orotherwise under any patent or patent rights ofSGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied.SGS-THOMSON Microelectronics productsare notauthorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.

 1994 SGS-THOMSON Microelectronics - All Rights Reserved

Purchase of I

2

I

C Patent. Rights touse these components in a I2C system, isgranted provided that the system conforms to

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2

C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips

2

the I

C Standard Specifications as defined by Philips.

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19/19