1

Rev. 1.0 February 1998

MOSEL VITELIC

MSU2051/U2031

Features

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

Working voltage : L series at 2.7V through 4.5V

while S & C series at 4.5 V through 5.5 V

General 80C51 family compatible

64 K byte External Memory Space

4 K byte ROM

128 byte data RAM

Two 16 bit Timers/Counters

Four 8-bit I/O ports

Full duplex serial channel

Bit operation instructions

Page free jumps

8 - bit Unsigned Division

8 - bit Unsigned Multiply

BCD arithmatic

Direct Addressing

Indirect Addressing

Nested Interrupt

Two priority level interrupt

A serial I/O port

Power save modes:

Idle mode and Power down mode

Working at 16/25/40 MHz Clock

Description

The MVI MSU2051 series product is an 8 - bit

single chip microcontroller. It provides hardware

features and a powerful instruction set,

necessary to make it a versatile and cost

effective controller for those applications

demand up to 32 I/O pins or need up to 64 K

byte external memory either for program or for

data or mixed.

A serial input / output port is provided for I/O

expansion, Inter - processor communications,

and full duplex UART.

Ordering Information

MSU2031ihhk

MSU2051ihh - yyyk

i: process identifier {S, L, C}.

hh: working clock in MHz {16, 25, 40}.

yyy: production code {001, ..., 999}

k: package type postfix {as below table}.

Postfix

blank

P

J

Q

U

Package

dice

40L PDIP

44L PLCC

44L PQFP

44L LQFP

Pin/Pad

Configuration

page 18

page 2

page 2

page 2

page 2

Dimension

page 18

page 14

page 15

page 16

page 17

Logo Size at

Top Marking

-

5.0 x 4.2 mm

4.5 x 3.8 mm

2.8 x 2.4 mm

2.8 x 2.4 mm

Product List

MSU2031L16, low working voltage 16 MHz ROM less MCU

MSU2031S16, small sink current 16 MHz ROM less MCU

MSU2031C16, 16 MHz ROM less MCU

MSU2031C25, 25 MHz ROM less MCU

MSU2031C40, 40 MHz ROM less MCU

MSU2051L16, low working voltage 16 MHz 4 KB internal ROM MCU

MSU2051S16, small sink current 16 MHz 4 KB internal ROM MCU

MSU2051C16, 16 MHz 4 KB internal ROM MCU

MSU2051C25, 25 MHz 4 KB internal ROM MCU

MSU2051C40, 40 MHz 4 KB internal ROM MCU

M.V.I.

W.B.

Philips

L.G.

Intel

CCL. itri

Atmel

MSU2051

W78C51

80C51

GMS80C501

80C51

CIC80510

AT80C51

MSU2031

W78C31

80C31

GMS80C301

80C31

- - - - -

AT80C31

Cross Reference