8

All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.

Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality

Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without

notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and

reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result

from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.

For information regarding Intersil Corporation and its products, see www.intersil.com

FN3158.7

April 17, 2006

Typical Application

FIGURE 7. 80C48 MICROPROCESSOR INTERFACE

28

40

39 T1

P27 38

37

36

35

P17 34

33

32

31

30

29

P10 27

26

PROG

22

24

23

P20 21

80C48

µCOMPUTER

2 XTAL1

13

3 XTAL2

4 RESET

5 SS

6 INT

7 EA

RD

DB0 12

14

15

16

17

18

19

20

1 TO

PSEN

ALE

11

9

25

DB7

10

8

27 28 29 30

CS2

36 OSC

+5V

8 DIGIT

LCD DISPLAY

SEGMENTS

HIGH ORDER DIGITS

ICM7211AM

INPUT

NC

+5V

I/O

I/O

DS1 DS2 CS1

31

32

33

34

DATA

2, 3, 4

BP 5

37-40

6-26

B0-B3

29

28

27

30

CS2

36 OSC

+5V

SEGMENTS

LOW ORDER DIGITS

ICM7211AM

DS1 DS2 CS1

31

32

33

34

DATA

2, 3, 4

BP 5

37-40

6-26

B0-B3

WR

ICM7211AM