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PCA84C846

Microcontrollers for TV tuning control and OSD applications

Philips Electronics 

Philips Semiconductors

Microcontrollers for TV tuning

control and OSD applications

Preliminary specification

PCA84C646; PCA84C846

2 GENERAL DESCRIPTION

The PCA84C646 and PCA84C846 are 8-bit

microcontrollers with enhanced OSD and VST functions.

The PCA84C646 and PCA84C846 are members of the

PCA84C640 CMOS microcontroller family. They include

the PCF84CXXXA processor core, 6 or 8 kbytes of ROM

and 192 bytes of RAM.

I/O requirements are adequately catered for with

13 general purpose bidirectional I/O lines plus 16 function

combined I/O lines. One 14-bit PWM analog control,

3 AFC inputs (4-bit DAC + comparator) for VST and four

6-bit and 7-bit PWM analog control outputs are provided.

In addition to all these features a master-slave I2C-bus

interface, 2 directly testable lines and an enhanced OSD

facility for flexible screen format (maximum of 64 character

types) are also provided.

The on-chip Phase-Locked Loop (PLL) oscillator for OSD

operation considerably reduces the radiation generated by

the RC or LC oscillator. An 8-bit timer is integrated on-chip

with a 5-bit prescaler. Another 8-bit counter with

Schmitt-trigger input is used for clock/timer function

application.

Figure 1 shows the block diagram of the PCA84C646 and

PCA84C846.

3 ORDERING INFORMATION

TYPE NUMBER

PCA84C646P

PCA84C846P

NAME

SDIP42

PACKAGE

DESCRIPTION

plastic shrink dual in-line package; 42 leads (600 mil)

VERSION

SOT270-1

1995 Jun 15

4

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