GENERAL DESCRIPTION

The EM83055H microcontroller is dedicated to a keyboard encoder ,specially designed for IBM PC AT and all compatible machines. The EM83055H controll all scan codes, three LEDs status, scan timing and communications between the keyboard and PC. It is easy to implement a high performance, low cost keyboard with the minimal external components.

FEATURES

• Low cost - eliminate need external components.

• Phantom key detects.

• RC oscillator ( 1.8432MHz ).

• Support scan code set 1 ,2 and 3.

• Support PC AT and PS/2 keyboard .

• Low power CMOS device technology.

• Internal pull-up resistor.

• Tri-state outputs for easy board application.

• Built-in 4K ROM.

• Support WINDOWSTM 95, 98, 2000, ME keys.

• 104/107 keys with multi-media or other special application keyboard encoder.

• WINDOWS is registered trademarks of Microsoft corperation.

APPLICATION

• IBM PC AT or compatible machine keyboard.

• IBM PS/2 model 30,50,60,80 or compatible machine keyboard.

• Japanese keyboard.

• Korean keyboard.

• Brazilian keyboard.

• European keyboard.