GENERAL DESCRIPTION

The EM83049 microcontroller is dedicated to a keyboard encoder ,specially designed for IBM PC AT,XT and all compatible machines. The EM83049 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,XT and PS/2 keyboard .

? Low power CMOS device technology.

? Internal pull-up resistor.

? Tri-state outputs for easy board application.

? 40 Pin DIP package.

? Built-in 4K ROM.

? Support WINDOWSTM keys.

? 101/102/104 keys or other special application keyboard encoder.

? WINDOWS is registered trademarks of Microsoft corperation.

APPLICATION

? IBM PC/AT,XT or compatible machine keyboard.

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

? Japanese keyboard.

? Korean keyboard.