GENERAL DESCRIPTION
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.

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.