May 2001

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

3/16

Ver 1.1

SM8051/8052 07/2005

SyncMOS Technologies Inc.

SM8051/80952

Timer 2

Timer 1

Timer 0

Stack

Pointer

Decoder &

Register

128/256

bytes RAM

Block Diagram

Reset

Circuit

Power

Circuit

Interrupt

Circuit

Timing

Generator

XTAL2

XTAL1

#EA

ALE

#PSEN

RES

Vdd

Vss

to pertinent blocks

to whole chip

to pertinent blocks

to whole system

Acc

Buffer2

Buffer1

ALU

PSW

Buffer

DPTR

PC

Incrementer

Program

Counter

Register

4/8 K

bytes

ROM

Memory

Port 0

Latch

Port 1

Latch

Port 2

Latch

Port 3

Latch

Port 0

Driver & Mux

Port 1

Driver & Mux

Port 2

Driver & Mux

Port 3

Driver & Mux

8

8

8

8

WDT

Instruction

Register