Philips Semiconductors

Product specification

OM5232

CMOS single-chip 8-bit microcontroller

1

December 1994

DESCRIPTION

The OM5232 Single-Chip 8-Bit Microcontroller is manufactured in an

advanced CMOS process and is a derivative of the 80C51

microcontroller family. The OM5232 has the same instruction set as

the 80C51.

See also:

– OM5202 — ROMless version

– OM5234 — 16K bytes mask programmable ROM

– OM5238 — 32K bytes mask programmable ROM

This device provides architectural enhancements that make it

applicable in a variety of applications for general control systems.

The OM5232 contains a non-volatile 8k

× 8 read-only program

memory, a volatile 256

× 8 read/write data memory, four 8-bit I/O

ports, two 16-bit timer/event counters (identical to the timers of the

80C51), a multi-source, two-priority-level, nested interrupt structure,

UART and on-chip oscillator and timing circuits. For systems that

require extra capability, the OM5232 can be expanded using

standard TTL compatible memories and logic.

The device also functions as an arithmetic processor having

facilities for both binary and BCD arithmetic plus bit-handling

capabilities. The instruction set consists of over 100 instructions: 49

one-byte, 45 two-byte and 17 three-byte. With a 16MHz crystal, 58%

of the instructions are executed in 0.75

µs and 40% in 1.5µs. Multiply

and divide instructions require 3

µs.

FEATURES

– Idle mode

– Power-down mode

PIN CONFIGURATIONS

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

P1.0

P1.1

P1.2

P1.3

P1.4

P1.5

P1.6

RST

RxD/P3.0

TxD/P3.1

INT0/P3.2

INT1/P3.3

T0/P3.4

T1/P3.5

P1.7

RD/P3.7

XTAL2

XTAL1

VSS

P2.0/A8

P2.1/A9

P2.2/A10

P2.3/A11

P2.4/A12

P2.5/A13

P2.6/A14

P2.7/A15

PSEN

ALE

EA

P0.7/AD7

P0.6/AD6

P0.5/AD5

P0.4/AD4

P0.3/AD3

P0.2/AD2

P0.1/AD1

P0.0/AD0

VDD

DIP

SEE PAGE 2 FOR QFP PIN FUNCTIONS.

QFP

44

34

1

11

33

23

12

22

WR/P3.6

(SOT307–2)

PART NUMBER SELECTION

PHILIPS PART

ORDER NUMBER

PART MARKING

PACKAGE NUMBER

TEMPERATURE RANGE

PACKAGE

FREQUENCY

MHz

SOT129

0 to +70, Plastic Dual In–line Package, 40 leads

1.2 to 16

SOT307–2

0 to +70, Plastic Quad Flat Pack, 44 leads

1.2 to 16

NOTE:

1. xxx denotes the ROM code number.

EQUIVALENT TYPES

Details are as specified by the data sheet for the equivalent type: