HT82K628A
Windows 2000 PS/2 Keyboard Encoder
Features
·
Design for Windows 95/98/NT/2000/XP
·
Supports Windows
TM
keys
·
Supports PC/AT and PS/2 code set 1, 2, 3
·
Supports Japanese , Korean , Brazilian and
·
101/102/104/105/107/109 keys or other special ap-
plication keyboard encoder
·
8 external hot keys
·
Supports Mini-keyboard and Internet/Multimedia
European
·
RC oscillator
·
Phantom key detection
·
Low power consumption
keyboard
·
WINDOWS is a registered trademark of Microsoft
corporation
·
40-pin DIP package
General Description
The HT82K628A is a keyboard encoder designed for
IBM PC/AT, IBM PS/2 and all compatible machines.
The HT82K628A accepts keyboard inputs and provides
a 16-character first-in-first-out buffer in which data is
stored.
An inexpensive RC oscillator can be used for the system
clock. Simple implementation of this device is an advan-
tage for high performance and low cost keyboard appli-
cations.
Pin Assignment
R 5
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
R 4
C 3
C 2
C 1
C 0
R 3
R 2
R 1
R 0
R 1 9
R 1 8
R 1 7
R 1 6
V S S
S C R O L L
N U M
D A T A
C L O C K
F n S e le c t
4 0
3 9
3 8
3 7
3 6
3 5
3 4
3 3
3 2
3 1
3 0
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
R 6
R 7
C 4
C 5
C 6
C 7
N C
O S C 1
V D D
R E S E T
C A P S
R 8
R 9
R 1 0
R 1 1
R 1 2
R 1 3
R 1 4
R 1 5
M a c r o K e y s e le c t
H T 8 2 K 6 2 8 A
4 0 D IP -A
Rev. 1.60
1
April 16, 2004
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
