89C538 datasheet(2/35 Pages) PHILIPS

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Philips Semiconductors

Preliminary specification

89C535/89C536/89C538

CMOS single-chip 8-bit microcontrollers

with FLASH program memory

1997 Jun 05

DESCRIPTION

The 89C535/89C536/89C538 are Single-Chip 8-Bit Microcontrollers

manufactured in advanced CMOS process and are derivatives of

the 80C51 microcontroller family. All the devices have the same

instruction set as the 80C51.

The devices also have four 8-bit I/O ports, three 16-bit timer/event

counters, a multi-source, two-priority-level, nested interrupt

structure, UART and on-chip oscillator and timing circuits. For

systems that require extra data memory capability up to 64k bytes,

each can be expanded using standard TTL-compatible memories

and logic.

The 89C535/89C536/89C538 contain a non-volatile FLASH EPROM

program memory (8K bytes in 89C535, 16k bytes in the 89C536,

and 64k bytes in the 89C538). The devices have 512 bytes of RAM

data memory.

FEATURES

• 80C51 Central Processing Unit

• 8k x 8 (89C535) 16k × 8 (89C536) or 64k × 8 (89C538), FLASH

EPROM Program Memory

• 512 × 8 RAM, externally expandable to 64k × 8 Data Memory

• Three 16-bit counter/timers

• Up to 3 external interrupt request inputs

• 6 interrupt sources with 2 priority levels

• Four 8-bit I/O ports

• Full-duplex UART

• Power control modes

– Idle mode

– Power down mode, with wakeup from power down using

external interrupt

• 44-pin PLCC and QFP packages

LOGIC SYMBOL

ADDRESS AND

DATA BUS

ADDRESS BUS

T2EX

RxD

TxD

INT0

INT1

RST

EA/VPP

PSEN

ALE/PROG

VSS

VCC

XTAL1

XTAL2

SU00830

ORDERING INFORMATION

PART NUMBER

MEMORY SIZE

TEMPERATURE RANGE (

°C) AND PACKAGE

FREQ.

(MHz)

DRAWING

NUMBER

P89C535NBA A

8k bytes

0 to +70, 44-pin Plastic Leaded Chip Carrier

SOT187-2

P89C536NBA A

16k bytes

0 to +70, 44-pin Plastic Leaded Chip Carrier

SOT187-2

P89C536NBB B

16k bytes

0 to +70, 44-pin Plastic Quad Flat Package

SOT307-2

P89C538NBA A

64k bytes

0 to +70, 44-pin Plastic Leaded Chip Carrier

SOT187-2

P89C538NBB B

64k bytes

0 to +70, 44-pin Plastic Quad Flat Package

SOT307-2

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