HT82K28A(2000) Datasheet PDF - Holtek Semiconductor

General Description
The HT82K28A is a keyboard encoder especially 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 oscillator can be used for the system clock. The device offers the advantage of simple implementation 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 Windows 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