1998 Apr 20

3

Philips Semiconductors

Product specification

Telecom microcontroller

PCF84C81A

1

FEATURES

• Manufactured in silicon gate CMOS process

• 8-bit CPU, ROM, RAM, I/O in a 28-lead package

• 8 kbyte ROM, 256 byte RAM (PCF84C81A)

• Over 100 instructions (based on MAB8048) all of

1 or 2 cycles

• 20 quasi-bidirectional I/O Port lines

• High sink current capability on the 8 lines of Port 1

• 8-bit programmable timer/event counter 1

• 3 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

• Supply voltage: 2.5 to 5.5 V

• Clock frequency: 1 to 16 MHz

• Operating temperature: −40 to +85 °C.

2

GENERAL DESCRIPTION

This data sheet details the specific properties of the

PCF84C81A. The shared properties of the PCF84CxxxA

family of microcontrollers are described in the

“PCF84CxxxA family” data sheet which should be read in

conjunction with this publication.

The PCF84C81A is a general purpose CMOS

microcontroller with 8 kbytes of program memory and

256 bytes of RAM. In addition to 20 I/O port lines, the

two-line serial bus extends the microcontroller capabilities

These include LCD drivers, I/O expanders, telecom

circuits, ADC and DAC converters, clock/calendar circuits,

EEPROM and RAM and are listed in

“Data Handbook

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 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

PCF84C81AP

DIP28

plastic dual in-line package; 28 leads (600 mil)

SOT117-1

PCF84C81AT

SO28

plastic small outline package; 28 leads; body width 7.5 mm

SOT136-1