Philips PCE84C48 Service Manual

INTEGRATED CIRCUITS

DATA SH EET

PCE84C486; PCE84C487

Microcontrollers for digital auto-sync and VST TV controller applications

Objective speciﬁcation File under Integrated Circuits, IC14

1996 Feb 21

Philips Semiconductors Objective speciﬁcation

Microcontrollers for digital auto-sync and VST TV controller applications

CONTENTS

1 FEATURES

1.1 General

1.2 Special 2 GENERAL DESCRIPTION 3 ORDERING INFORMATION 4 BLOCK DIAGRAMS 5 PINNING INFORMATION

5.1 Pinning

5.2 Pin description 6 RESET

6.1 External reset using the RESET pin

6.2 Power-on-reset

6.3 Watchdog Timer reset

6.4 Reset trip level

6.5 Reset status 7 ANALOG (DC) CONTROL

7.1 6 and 7-bit PWM outputs

7.2 8-bit PWM outputs

7.3 14-bit PWM output (PWM8)

7.4 A typical PWM output application 8 ANALOG-TO-DIGITAL CONVERTER (ADC)

8.1 Conversion algorithm

8.2 A typical application for keypad detection 9I 10 8-BIT COUNTER (T3) 11 WATCHDOG TIMER (WDT) 12 OUTPUT PORTS

12.1 Mask options 13 DERIVATIVE REGISTERS

C-BUS INTERFACE

PCE84C486;

PCE84C487

14 LIMITING VALUES 15 DC CHARACTERISTICS 16 AC CHARACTERISTICS 17 PACKAGE OUTLINES 18 SOLDERING

18.1 Introduction

18.2 SDIP 19 DEFINITIONS 20 LIFE SUPPORT APPLICATIONS 21 PURCHASE OF PHILIPS I2C COMPONENTS

1996 Feb 21 2

Philips Semiconductors Objective speciﬁcation

Microcontrollers for digital auto-sync and VST TV controller applications

1 FEATURES

1.1 General

• CMOS 8-bit CPU (enhanced 8048 CPU) with 4 kbytes system ROM and 128 bytes system RAM

• One 8-bit timer/event counter (T1) and one 8-bit counter (T3) triggered by external input

• Three single level vectored interrupt sources: external (INTN), counter/timer and I

• 2 directly testable inputs T0 and T1

• On-chip oscillator clock frequency: 1 to 10 MHz

• On-chip Power-on-reset with low power detector

• The PCE84C486 has eleven quasi-bidirectional I/O

lines, the PCE84C487 has twelve. The configuration of each I/O line individually selected by mask option

• Idle and Stop modes for reduced power consumption

• Operating temperature: −25 to +85 °C

• Operating voltage: 4.5 to 5.5 V

• Packages: SDIP32 for the PCE84C486; SDIP42 for the

PCE84C487.

1.2 Special

• Master-slave I

• Four 6-bit Pulse Width Modulated outputs

• Four 7-bit Pulse Width Modulated outputs

• Four 8-bit Pulse Width Modulated outputs (PCE84C487

only)

• One 14-bit Pulse Width Modulated output

• Two 4-bit Analog-to-Digital Converter (ADC) channels

• 14 derivative I/O ports

• Watchdog Timer.

C-bus interface

C-bus

PCE84C486; PCE84C487

2 GENERAL DESCRIPTION

The PCE84C486 and PCE84C487 are low-cost microcontrollers and have been designed for use with auto-sync monitors, handling mode detection, digital control and Voltage Synthesized Tuning (VST). These microcontrollers have no on-chip OSD function.

The term PCE84C48X is used throughout this data sheet to refer to both devices. Differences between the PCE84C486 and the PCE84C487 are highlighted throughout the document.

The PCE84C48X is a member of the 84CXXX CMOS microcontroller family. The device uses the PCE84CXX processor core and has 4 kbytes of ROM and 128 bytes of RAM. I/O requirements are catered for with 11 general purpose bidirectional I/O lines (the PCE84C487 has 12) plus 12 function combined I/O lines (the PCE84C487 has

16). Nine PWM analog outputs (the PCE84C487 has 13) are available for analog control purposes and also a two channel 4-bit ADC. The device has an 8-bit counter (T3), for use in pulse counting applications and also an 8-bit timer/counter (T1) with programmable clock. A Watchdog timer, a master-slave I2C-bus interface and 2 directly testable lines are also available on-chip.

The block diagram of the PCE84C486 is shown in Fig.1; the block diagram of the PCE84C487 is shown in Fig.2.

3 ORDERING INFORMATION

TYPE NUMBER

NAME DESCRIPTION VERSION

PCE84C486 SDIP32 plastic shrink dual in-line package; 32 leads (400 mil) SOT232-1 PCE84C487 SDIP42 plastic shrink dual in-line package; 42 leads (600 mil) SOT270-1

1996 Feb 21 3

PACKAGE

Philips Semiconductors Objective speciﬁcation

Microcontrollers for digital auto-sync and VST TV controller applications

4 BLOCK DIAGRAMS

RESET

8-bit internal bus

WATCHDOG TIMER

I C-BUS

INTERFACE

2 x 4-BIT ADC

PCE84C486; PCE84C487

MGC912

SDA SCL

and

ADC1

ADC2

INTN / T0 T3

RAM

128 bytes

ROM

4 kbytes

8-BIT

COUNTER

CPU

8-BIT

TIMER /

EVENT

COUNTER

4 x 6-BIT PWM

4 x 7-BIT PWM

1 x 14-BIT PWM



I / O PORTS

PCF84CXX

core 

excluding

ROM / RAM

I / O

PORTS

PARALLEL

EMU

(1) (1) (2) (3)

to

PWM8

PWM0 

DP1 DP2

DP0

handbook, full pagewidth

Fig.1 PCE84C486 block diagram.

XTAL1 (IN)

XTAL2 (OUT)

1996 Feb 21 4

(1) Alternative functions of DP0 and DP1.

(2) Alternative functions of DP2.

(3) Alternative function of P1.

Philips Semiconductors Objective speciﬁcation

Microcontrollers for digital auto-sync and VST TV controller applications

RESET

8-bit internal bus

WATCHDOG TIMER

RAM

128 bytes

I C-BUS

INTERFACE

2 x 4-BIT ADC

PWM

4 x 8-BIT

PCE84C486; PCE84C487

MGC913

SDA SCL

and

ADC1

ADC2

to

PWM13

PWM10 

INTN / T0 T3 RSTO

ROM

4 kbytes

8-BIT

COUNTER

CPU

8-BIT

EVENT

TIMER /

XTAL1 (IN)

COUNTER

XTAL2 (OUT)

4 x 6-BIT PWM

4 x 7-BIT PWM

1 x 14-BIT PWM



I / O PORTS

PCF84CXX

core 

excluding

I / O

PORTS

PARALLEL

EMU

ROM / RAM

(1) (2) (1) (2) (3)

to

PWM8

PWM0 

38 5

DP0 DP1 DP2

handbook, full pagewidth

Fig.2 PCE84C487 block diagram.

1996 Feb 21 5

(1) Alternative functions of DP0 and DP1.

(2) Alternative function of DP2.

(3) Alternative function of P1.

Philips Semiconductors Objective speciﬁcation

Microcontrollers for digital auto-sync and VST TV controller applications

5 PINNING INFORMATION

5.1 Pinning

handbook, halfpage

DP13/PWM8

DP20/SDA

P10/SCL

P11

P12

P14 P00 P01 P02 P03 P04 P05 P06 P07

1 2 3 4 5 6 7 8

PCE84C486

9 10 11 12 13 14 15 16

MGC904

DP07/PWM7

DP12/ADC2

INTN/T0

RESET

XTAL2(OUT)

XTAL1(IN)

DP00/PWM0

DP01/PWM1

DP02/PWM2

DP03/PWM3

DP04/PWM4

DP05/PWM5

DP06/PWM6

DP11/ADC1

handbook, halfpage

DP20/SDA

DP13/PWM8

DP24/PWM10

DP25/PWM11

PCE84C486; PCE84C487

P10/SCL

P11

P12

n.c.

P14 P00

RSTO

P01 P02

P03

n.c. P04 P05 P06 P07

1 2 3 4 5 6 7 8

9 10 11

PCE84C487

12 13 14 15 16 17 18 19 20

MGC905

DP07/PWM7

DP12/ADC2

INTN/T0

RESET

n.c.

XTAL2(OUT)

XTAL1(IN)

DP27/PWM13

EMU

DP00/PWM0

DP01/PWM1

DP26/PWM12

DP02/PWM2

n.c.

DP03/PWM3

DP04/PWM4

DP05/PWM5

DP06/PWM6

2221

DP11/ADC1

Fig.3 Pin configuration - PCE84C486.

1996 Feb 21 6

Fig.4 Pin configuration - PCE84C487.

Philips Semiconductors Objective speciﬁcation

Microcontrollers for digital auto-sync and

PCE84C486; PCE84C487

VST TV controller applications

5.2 Pin description Table 1 SDIP32 package

SYMBOL PIN DESCRIPTION

DP20/SDA 1 Derivative port line 20 or I

P10/SCL 2 Port line 10 or I P11 3 Port line 11 or emulation input DP13/PWM8 4 Derivative I/O port 13 or PWM8 output. P12 5 Port line 12 or emulation input DXALE. T3 6 8-bit counter input (Schmitt trigger). P14 7 Port line 14 or emulation output DXINT. P00 to P07 8 to 15 General I/O port lines. V

DP11/ADC1 17 Derivative I/O port 11 or ADC Channel 1input. DP00/PWM0 to DP07/PWM7 24 to 18, 32 Derivative I/O ports or 6 and 7-bit PWM outputs. V

XTAL1 (IN) 26 Oscillator input pin for system clock. XTAL2 (OUT) 27 Oscillator output pin for system clock. RESET 28 Reset input; active LOW input initializes device. T1 29 Direct testable pin or event counter input. INTN/T0 30 External interrupt or direct testable pin. DP12/ADC2 31 Derivative I/O port 12 or ADC Channel 2 input.

16 Ground pin.

25 Power supply.

C-bus clock line or emulation input DXWR.

C-bus data line.

DXRD.

1996 Feb 21 7

Philips Semiconductors Objective speciﬁcation

Microcontrollers for digital auto-sync and

PCE84C486; PCE84C487

VST TV controller applications

Table 2 SDIP42 package

SYMBOL PIN DESCRIPTION

DP20/SDA 1 Derivative port line 20 or I

P10/SCL 2 Port line 10 or I P11 3 Port line 11 or emulation input DP13/PWM8 4 Derivative I/O port 13 or PWM8 output. P12 5 Port line 12 or emulation input DXALE. n.c. 6 Not connected. T3 7 8-bit counter input (Schmitt trigger). DP24/PWM10 to DP27/PWM13 8, 14, 29, 34 Derivative I/O ports or 8-bit PWM outputs. P14 9 Port line 14 or emulation output DXINT.

P00 to P07 RSTO 11 Used for emulation purposes only. This active HIGH output is the

n.c. 16 Not connected. V

DP11/ADC1 22 Derivative I/O port 11 or ADC channel 1 input. DP04/PWM4 to DP07/PWM7 25, 24, 23, 42 Derivative I/O ports or 6-bit PWM outputs. n.c. 27 Not connected. DP00/PWM0 to DP03/PWM3 31, 30, 28, 26 Derivative I/O ports or 7-bit PWM outputs. EMU 32 Emulation mode control input, normally LOW. V

XTAL1 (IN) 35 Oscillator input pin for system clock. XTAL2 (OUT) 36 Oscillator output pin for system clock. n.c. 37 Not connected. RESET 38 Reset input; active LOW input initializes device. T1 39 Direct testable pin or event counter input. INTN/T0 40 External interrupt or direct testable pin. DP12/ADC2 41 Derivative I/O port 12 or ADC Channel 2 input.

10, 12, 13, 15,

17, 18, 19, 20

21 Ground pin.

33 Power supply.

General I/O port lines.

result of the OR operation carried out internally on the input and the Watchdog Timer reset line.

C-bus clock line or emulation input DXWR.

C-bus data line.

DXRD.

RESET

1996 Feb 21 8

Philips Semiconductors Objective speciﬁcation

Microcontrollers for digital auto-sync and VST TV controller applications

6 RESET

To initialize the microcontroller to a defined state a reset operation is performed. A reset can be generated in three ways:

• applying an external signal to the RESET pin

• via Power-on-reset circuitry

• by the Watchdog Timer.

6.1 External reset using the

An active LOW signal from an external logic device will reset the device. The signal must be maintained long enough to allow VDD to reach its f operating voltage.

6.2 Power-on-reset

A Power-on-reset can be generated using an external RC circuit. To avoid overload of the internal diode, an external diode should be added in parallel if C The RC circuit is shown in Fig.5.

RESET pin

-dependent minimum

xtal

≥ 2.2 µF.

RESET

PCE84C486; PCE84C487

6.4 Reset trip level

The RESET trip voltage level for both the PCE84C486 and PCE84C487 is masked to 1.3 V.

6.5 Reset status

• Derivative Registers reset status; see Table 8 for details

• Program Counter 00H

• Memory Bank 0

• Register Bank 0

• Stack Pointer 00H

• All interrupts disabled

• Timer/event counter 1 stopped and cleared

• Timer pre-scaler modulo-32 (PS = 0)

• Timer flag cleared

• Serial I/O interface disabled (ESO = 0) and in slave

receiver mode

• Idle and Stop mode cleared.

6.3 Watchdog Timer reset

An overflow of the Watchdog Timer will cause the device to be reset. The operation of the Watchdog Timer is described in Chapter 12.

handbook, halfpage

RESET

( 100 kΩ)

RESET

internal reset

PCA84C8XX

MLC259

Fig.5 External components for RESET pin.

1996 Feb 21 9

Philips Semiconductors Objective speciﬁcation

Microcontrollers for digital auto-sync and VST TV controller applications

7 ANALOG (DC) CONTROL

The PCE84C486 has nine Pulse Width Modulated outputs (PWM0 to PWM8) and the PCE84C487 has thirteen Pulse Width Modulated outputs (PWM0 to PWM8 and PWM10 to PWM13). These outputs are used for analog control purposes e.g. brightness, contrast, H-shift, V-shift, H-width, V-size, pin-cushion, trapezium, R (or G or B) gain control, sound volume etc. Each PWM output generates a pulse pattern with a programmable duty cycle.

The PWM outputs are specified below:

• PWM0 to PWM3: 4 PWM outputs with 7-bit resolution

• PWM4 to PWM7: 4 PWM outputs with 6-bit resolution

• PWM8: 1 PWM output with 14-bit resolution

• PWM10 to PWM13: 4 PWM outputs with 8-bit

resolution.

The 6 and 7-bit PWM outputs are described in Section 7.1; the 8-bit PWM outputs are described in Section 7.2 and the 14-bit PWM output is described in Section 7.3. A typical PWM output application is described in Section 7.4.

7.1 6 and 7-bit PWM outputs

The block diagram for the 6 and 7-bit PWM outputs is shown in Fig.6.

Pulse Width Modulated outputs PWM0 to PWM7 share the same pins as Derivative Port lines DP00 to DP07, respectively. Selection of the pin function as either a PWM output or a Derivative Port line is achieved using the appropriate PWMnE bit in the PWME1 Register (see Table 8).

The polarity of the 6 and 7-bit PWM outputs is programmable and is selected by the P7LVL or the P6LVL bit in the CON2 Register (see Table 8). The state of the P7LVL bit determines the polarity of the 7-bit PWMs; the state of the P6LVL bit determines the polarity of the 6-bit PWMs.

The duty cycle of each PWM output is dependent upon the programmable contents of its associated data latch (PWM0 to PWM7 Registers respectively). As the clock frequency of each PWM circuit is of the pulse generated can be calculated as shown below.

⁄3× f

, the pulse width

xtal

PCE84C486; PCE84C487

The maximum repetition frequency (f 7-bit PWM outputs is shown below.

For the 6-bit PWM outputs:

For the 7-bit PWM outputs:

PWM

7.2 8-bit PWM outputs

The block diagram for the 8-bit PWM outputs is shown in Fig.8.

The 8-bit PWM outputs PWM10 to PWM13 (only available with the PCE84C487) share the same pins as Derivative Port lines DP24 to DP27, respectively. Selection of the pin function as either a PWM output or a Derivative Port line is achieved using the appropriate PWMnE bit in the PWME2 Register (see Table 8). In the PCE84C486 the contents of the PWME2 register should be set so that these PWM outputs are disabled (i.e 00H).

The polarity of the 8-bit PWM outputs is programmable and is selected by the P8LVL bit in the CON2 Register.

The duty cycle of each 8-bit PWM output is dependent upon the programmable contents of its associated data latch (PWM10 to PWM13 Registers respectively). As the clock frequency of each PWM circuit is f width of the pulse generated can be calculated as shown below.

Pulse width

PWMn()

-----------------------f

xtal

Where (PWMn) is the decimal value held in the data latch. The maximum repetition frequency (f

PWM outputs is shown below.

PWM

--------- 256

xtal

An 8-bit PWM output is driven HIGH when the value held in its data latch is 00H. This is different to the 6 and 7-bit PWM outputs which are driven LOW when their data latches contain 00H.

PWM

xtal

--------- 192

xtal

--------- 384

PWM

) of the 6 and

, the pulse

xtal

) of the 8-bit

3 PWMn()×

Pulse width

---------------------------------f

xtal

Where (PWMn) is the decimal value held in the data latch.

1996 Feb 21 10

Philips Semiconductors Objective speciﬁcation

Microcontrollers for digital auto-sync and VST TV controller applications

handbook, full pagewidth

xtal

6 or 7-BIT PWM DATA LATCH

6 or 7-BIT DAC PWM

CONTROLLER

internal data bus

P6LVL/P7LVL

PCE84C486; PCE84C487

DP0x data

I/O

PWMnE

DP0x/PWMx

MLC069

handbook, full pagewidth

xtal

64 or

128

63

or

127

Fig.6 Block diagram for 6 and 7-bit PWMs.

1 2 3 m m + 1 m + 2

decimal value PWM data latch

64

or

128

MLC261

Fig.7 Typical non-inverted output pulse patterns for 6 or 7-bit PWM outputs.

1996 Feb 21 11

+ 25 hidden pages