1996 Nov 21

3

Philips Semiconductors

Product specification

Microcontroller with extended I/O

PCF84C85A

1

FEATURES

• 8-bit CPU, ROM, RAM, I/O in a single 40-lead package

• 8 kbytes ROM

• 256 bytes RAM

• Over 100 instructions (based on MAB8048)

all of 1 or 2 cycles

• 32 quasi-bidirectional I/O port lines

• 8-bit programmable timer/event counter 1

• Three single-level vectored interrupts:

– external

– 8-bit programmable timer/event counter 1

• Two test inputs, one of which also serves as the external

interrupt input

• Stop and Idle modes

• Clock frequency: 1 to 16 MHz

• Operating temperature: −40 to +85 °C

• Manufactured in silicon gate CMOS process.

2

GENERAL DESCRIPTION

This data sheet details the specific properties of the

PCF84C85A. The shared properties of the PCF84CxxxA

family of microcontrollers are described in the

“PCD84xxxA family” data sheet which should be read in

conjunction with this publication.

The PCF84C85A is a general purpose CMOS

microcontroller with emphasis on input/output. It provides

32 I/O port lines, 8 kbytes of program memory and

256 bytes of RAM. In addition to the 32 I/O port lines, the

two-line serial bus extends the microcontroller's

peripherals.These include LCD drivers, telecom circuits,

AD/DA converters, clock/calendar circuits, EEPROM and

RAM and are listed in

Peripherals”.

The instruction set is based on that of the MAB8048 and is

a sub-set of that listed in the

“PCF84CXXXA family” data

sheet.

3

ORDERING INFORMATION (see note 1)

Note

1. Please refer to the Order Entry Form (OEF) for this device for the full type number to use when ordering. This type

number will also specify the required program and the ROM mask options.

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

PCF84C85AP

DIP40

plastic dual in-line package; 40 leads (600 mil)

SOT 129-1

PCF84C85AT

VSO40

plastic very small outline package; 40 leads

SOT 158-1