IN80C39N/IN80C49N

1

CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

The 80C39/80C49 is a high-performance microcontroller fabricated with high-density

CMOS technology.

The 80C49 contains a 2k x 8 ROM , a 128 x 8 RAM , 27 I/O lines, 8-bit counter/timers, a

two-source, one level interrupt structure, and on-chip oscillator and clock circuits.

The device has two modes of power reduction

 idle mode and power-down mode. The

idle mode freezes the CPU while allowing the RAM, timer, and interrupt system to

continue functioning. The power-down mode saves the RAM contents but freezes the

oscillator, causing all other chip functions to be inoperative.

FEATURES

8039/8049 compatible

(MCS-48 family)

 2k x 8 ROM (80C49)

 ROMless (80C39)

 128 x 8 RAM

 8-bit counter/timers

•

Memory addressing capability

 4k ROM and 4k RAM

•

Power control modes:

 Idle mode

 Power-down mode

•

CMOS and TTL compatible

•

 8 MHz

• Fully static design operation from DC to 8MHz

• Single step input

PIN CONFIGURATIONS

39

1

2

3

4

5

40

6

8

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

TO

XT A L 2

RE S E T

SS

IN T

PS E N

WR

XT A L 1

9

7

EA

RD

DB 0

DB 1

DB 4

DB 5

DB 6

DB 7

T1

P2 7

P2 6

P2 5

P2 4

P1 7

P1 6

P1 5

P1 4

P1 3

P1 2

P1 1

P1 0

P2 3

P2 2

P2 1

P2 0

AL E

DB 2

DB 3

PL A S T I C

DUA L

IN -L IN E

P ACK AG E

PR O G