EM83049 EM83049
KEYBOARD KEYBOARD ENCODER ENCODER
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 f...