IS89C52

Integrated Silicon Solution, Inc. — 1-800-379-4774

1

MC013-1C

11/21/98

ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any errors which

may appear in this publication. © Copyright 1998, Integrated Silicon Solution, Inc.

IS89C52

CMOS SINGLE CHIP

8-BIT MICROCONTROLLER

with 8-Kbytes of FLASH

NOVEMBER 1998

FEATURES

• 80C51 based architecture

• 8-Kbytes of on-chip Reprogrammable Flash

Memory

• 256 x 8 RAM

• Three 16-bit Timer/Counters

• Full duplex serial channel

• Boolean processor

• Four 8-bit I/O ports, 32 I/O lines

• Memory addressing capability

– 64K ROM and 64K RAM

• Program memory lock

– Lock bits (3)

•

Power save modes:

– Idle and power-down

• Eight interrupt sources

• Most instructions execute in 0.3

µs

• CMOS and TTL compatible

• Maximum speed: 40 MHz @ Vcc = 5V

• Industrial temperature available

• Packages available:

– 40-pin DIP

– 44-pin PLCC

– 44-pin PQFP

GENERAL DESCRIPTION

The

fabricated using high-density CMOS technology. The

CMOS IS89C52 is functionally compatible with the

industry standard 80C51 microcontrollers.

The IS89C52 is designed with 8-Kbytes of Flash

memory, 258 x 8 RAM; 32 programmable I/O lines; a serial

I/O port for either multiprocessor communications, I/O

expansion or full duplex UART; three 16-bit timer/counters;

an eight-source, two-priority-level, nested interrupt

structure; and an on-chip oscillator and clock circuit. The

IS89C52 can be expanded using standard TTL compatible

memory.

Figure 1. IS89C52 Pin Configuration: 40-pin PDIP

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

T2/P1.0

T2EX/P1.1

P1.2

P1.3

P1.4

P1.5

P1.6

P1.7

RST

RxD/P3.0

TxD/P3.1

INT0/P3.2

INT1/P3.3

T0/P3.4

T1/P3.5

WR/P3.6

RD/P3.7

XTAL2

XTAL1

GND

VCC

P0.0/AD0

P0.1/AD1

P0.2/AD2

P0.3/AD3

P0.4/AD4

P0.5/AD5

P0.6/AD6

P0.7/AD7

EA/VPP

ALE/PROG

PSEN

P2.7/A15

P2.6/A14

P2.5/A13

P2.4/A12

P2.3/A11

P2.2/A10

P2.1/A9

P2.0/A8