9

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

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

Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design 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 reli-

able. 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 web site www.intersil.com

Sales Office Headquarters

NORTH AMERICA

Intersil Corporation

2401 Palm Bay Rd.

Palm Bay, FL 32905

TEL: (321) 724-7000

FAX: (321) 724-7240

EUROPE

Intersil SA

Mercure Center

100, Rue de la Fusee

1130 Brussels, Belgium

TEL: (32) 2.724.2111

FAX: (32) 2.724.22.05

ASIA

Intersil Ltd.

8F-2, 96, Sec. 1, Chien-kuo North,

Taipei, Taiwan 104

Republic of China

TEL: 886-2-2515-8508

FAX: 886-2-2515-8369

FIGURE 9. 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

2XTAL1

13

3XTAL2

4 RESET

5SS

6INT

7EA

RD

DB0 12

14

15

16

17

18

19

20

1TO

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

ICM7211A