HT82K28 datasheet(1/20 Pages) HOLTEK

部件名	HT82K28

功能描述	Win98 Keyboard Encoder

PDF	20 Pages

Scroll/Zoom	100%

制造商	HOLTEK [Holtek Semiconductor Inc]

网页	http://www.holtek.com

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1 / 20 page

HT82K28A

Win98 Keyboard Encoder

Pin Assignment

1

February 16, 2000

General Description

The HT82K28A is a keyboard encoder espe-

cially designed for IBM PC/AT, IBM PS/2 and

all compatible machines.

The HT82K28A accepts keyboard inputs and

contains a 16-character first-in-first-out buffer

in which data is stored. An inexpensive RC os-

cillator can be used for the system clock. The

device offers the advantage of simple imple-

mentation in high performance and low cost

keyboard applications.

Features

·

Designed for Windows 95/98/NT

·

Supports 3 Windows 95 Keys

·

Supports Power, Sleep and Wake-up Win-

dows 98 ACPI functions

·

Supports Japanese, Korean and Portuguese

·

Supports Japanese DOS/V 106-key

keyboard

·

Supports code set 1, for PS/2 model

30 keyboard

·

Supports code set 2, for PC/AT, PS/2 model

50,60 keyboards

·

Supports code set 3, for PS/2 model

80 keyboard

·

RC oscillator

·

Phantom key detection

·

Minimal external components

·

Pin-compatible with Holtek HT6547E-2

·

40-pin DIP/DICE form

H T 82K 28A

4 0 D I P

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

C1

C0

DA T A

CL O C K

R1 8

R1 7

NC

R1 6

CA P

NUM

S CRL

R9

R8

R1 5

R1 4

NC

R1 3

R7

R6

R5

OS C 1

VS S

VD D

VS S

IO 0

IO 1

C2

C3

C4

C5

C6

C7

R1 0

R1 1

R1 2

R0

R1

R2

R3

R4

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

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