2001 Apr 06

5

Philips Semiconductors

Preliminary specification

P87C51MB2/P87C51MC2

80C51 8-bit microcontroller family with extended memory

64KB/96KB OTP with 2KB/3KB RAM

PIN CONFIGURATION

1. Pins 1, 12, 23, 34 were not internally connected in some derivatives. Please refer to section on Pin Descriptions for details.

PLCC44

7

17

39

29

18

28

6

40

PLASTIC

LEADED

CHIP CARRIER

1

Pin Function

1

1

2

P1.0/T2

3

P1.1/T2EX

4

P1.2/ECI

5

P1.3/CEX0

6

P1.4/CEX1/MOSI

7

P1.5/CEX2/SPICLK

8

P1.6/CEX3

9

P1.7/CEX4

10

RST

11

P3.0/RXD0

12

13

P3.1/TXD0

14

P3.2/INT0

15

P3.3/INT1

16

P3.4/T0

17

P3.5/T1

18

P3.6/WR

19

P3.7/RD

20

XTAL2

21

XTAL1

22

Pin Function

23

1

24

P2.0/A8/A16

25

P2.1/A9/A17

26

P2.2/A10/A18

27

P2.3/A11/A19

28

P2.4/A12/A20

29

P2.5/A13/A21

30

P2.6/A14/A22

31

P2.7/A15

32

PSEN

33

ALE

34

35

EA/Vpp

36

P0.7/AD7

37

P0.6/AD6

38

P0.5/AD5

39

P0.4/AD4

40

P0.3/AD3

41

P0.2/AD2

42

P0.1/AD1

43

P0.0/AD0

44