EM84502 - ELAN Microelectronics Corp

EM84502 PS/2 MOUSE ENCODER

The EM84502 Mouse Controller is specially designed to control PS/2 mouse device.This single chip can interface three key-switches and four photo-couples direct to 8042. EM84502 can receive command and echo status or data format which are compatible with IBM PS/2 mode mouse. Key debouncing circuit is provided to prevent false entry and improve the accuracy. I.

Features

•
•
•
•
•
•
•
• Being compatiable with PS/2 mouse mode. Built-in noise immunity circuit. Low power dissipation. RC oscillation. Three key-switches and four photo-couples inputs. Both key-press and key-release debounce interval 12 ms. Through three key-switches input, EM84502 can exert seven different output. The motion detector of the EM84502 could sense 8 m/sec maximun with 200 DPI wheels. APPLICATIONS
•
•
•
•
• Optical mouse or pen-mouse. Mechanical mouse or pen-mouse. Optomechanical mouse or pen-mouse. Mechanical track ball. Optomechanical track ball. PIN ASSIGNMENT EM84502AP VDD OP OSC.O.