Holtek Semiconductor HT82K628
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.FEATURES
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● Windows 2000 Keyboard Encoder
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● HT82K628A Design for Windows 95/98/2000/NT Supports WindowsTM 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 101/102/104/109 keys or other special application keyboard encoder 8 external hot keys Supports Mini-keyboard and Internet/Multimedia keyboard WINDOWS is a registered trademark of Microsoft corporation 40-pin DIP/DICE form package
GENERAL DESCRIPTION
An inexpensive RC oscillator can be used for the system clock. Simple implementation of this device is an advantage for high performance and low cost keyboard applications. 1 July 20, 2000 Preliminary 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...