September 2002

Specifications subject to change without notice,contact your sales representatives for the most recent information.

1/25

Ver 1.0 PID 8958A 09/02

SyncMOS Technologies Inc.

SM8958A

Features

Working voltage: 3.0V ~ 3.6V For L Version

4.5V ~ 5.5V For C Version

General 8052 family compatible

12 clocks per machine cycle

32K byte on chip program flash

1024 byte on-chip data RAM

Three 16 bit Timers/Counters

One Watch Dog Timer

Four 8-bit I/O ports for PDIP package

Four 8-bit I/O ports + one 4-bit I/O ports for PLCC or QFP package

Full duplex serial channel

Bit operation instruction

Page free jumps

8-bit Unsigned Division

8-bit Unsigned Multiply

BCD arithmetic

Direct Addressing

Indirect Addressing

Nested Interrupt

Two priority level interrupt

A serial I/O port

Power save modes: Idle mode and Power down mode

Code protection function

Low EMI (inhibit ALE)

Bank mapping direct addressing mode for access on-chip RAM

5 channel SPWM function with P1.3 ~ P1.7

Postfix

Package

Pin/Pad

Configuration

Dimension

P

40L PDIP

page 2

page 21

J

44L PLCC

page 2

page 22

Q

44L QFP

page 2

page 23

Product List

SM8958AL25, 25MHz 32KB internal flash MCU

SM8958AC25, 25MHz 32KB internal flash MCU

SM8958AC40, 40MHz 32KB internal flash MCU

Description

The SM8958A series product is an 8 - bit single chip micro

controller with 32KB on-chip flash and 1K byte RAM

embedded. It is a derivative of the 8052 micro controller

family. It has 5-channel SPWM build-in. User can access

on-chip expanded RAM with easier and faster way by its

‘bank mapping direct addressing mode’ scheme. With its

hardware features and powerful instruction set, it’s

straight forward to make it a versatile and cost effective

controller for those applications which demand up to 32 I/

O pins for PDIP package or up to 36

I/O pins for PLCC/QFP package, or applications which

need up to 32K byte flash memory for program data.

To program the on-chip flash memory, a commercial writer

is available to do it in parallel programming method.

Ordering Information

yywwv

SM8958Aihhk

yy: year, ww:week

v: version identifier {, A, B,...}

i: process identifier {L=3.0V ~ 3.6V, C=4.5V ~ 5.5V}

hh: working clock in MHz {25, 40}

k: package type postfix {as below table}

v: version identifier

Taiwan

4F, No. 1 Creation Road 1,

Science-based Industrial Park,

Hsinchu, Taiwan 30077

TEL: 886-3-578-3344

FAX: 886-3-579-2960

886-3-578-0493

886-3-579-2988

8 - Bit Micro-controller

Web site: http://www.syncmos.com.tw

with 32KB flash & 1KB RAM embedded