Holtek HT82K628A Manual

Features
·
Design for Windows 95/98/2000/NT
· TM
Supports Windows keys
·
Supports PC/AT and PS/2 code set 1, 2, 3
·
Supports Japanese , Korean , Brazilian and
European
·
RC oscillator
·
Phantom key detection
·
Low power consumption
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.
Pin Assignment
Rev. 1.30
Windows 2000 Keyboard Encoder
·
101/102/104/105/107/109 keys or other special ap-
plication keyboard encoder
·
8 external hot keys
·
Supports Mini-keyboard and Internet/Multimedia
keyboard
·
WINDOWS is a registered trademark of Microsoft
corporation
·
40-pin DIP package
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.
R 5 R 6
1 4 0
R 4 R 7
2 3 9
C 3 C 4
3 3 8
C 2
C 5
4 3 7
C 1
C 6
5 3 6
C 0 C 7
6 3 5
R 3 N C
7 3 4
R 2 O S C 1
8 3 3
R 1 V D D
9 3 2
R 0 R E S E T
3 1
1 0
R 1 9 C A P S
1 1 3 0
R 1 8 R 8
1 2 2 9
R 1 7 R 9
1 3 2 8
R 1 6
R 1 0
1 4 2 7
V S S R 1 1
1 5 2 6
S C R O L L R 1 2
1 6 2 5
N U M R 1 3
1 7 2 4
D A T A R 1 4
1 8 2 3
C L O C K R 1 5
1 9 2 2
. n S e l e c t M a c r o K e y s e l e c t
2 0 2 1
H T 8 2 K 6 2 8 A
4 0 D I P - A
1
HT82K628A
October 3, 2002