General Description

The EM84513 Scrolling Mouse Controller is specially designed to control 400cpi or 800cpi PS/2 mouse device. This single chip can interface four photo-couples plus z-axis direct to 8042 controller.

Features

■ Using 51k 5 resistor for RC oscillation.

■ Compatible with legacy PS/2 mouse.

■ Compatible with Microsoft scrolling mouse.

■ Built-in noise immunity circuit.

■ Built-in current comparator for photo-couples input.

■ Built-in three step dynamic input impedance.

■ Two types Z direction input:

• Photo couples input. (Z/4)

• Mechanical input. (Z/2)

■ Two types resolution (Selected by package type):

• 400CPI.

• 800CPI.

■ Both key-press and key-release debounce interval 12 ms.

■ The sampilng rate of motion detector is about 65KHz.

■ Low power dissipation.

■ Package type:

• EM84513AEP : 16DIP(300mil), 400CPI, Photo couples input. (Z/4)

• EM84513AFP : 16DIP(300mil), 400CPI, Mechanical input. (Z/2)

• EM84513BEP : 16DIP(300mil), 800CPI, Photo couples input. (Z/4)

• EM84513BFP : 16DIP(300mil), 800CPI, Mechanical input. (Z/2)

Application

PS/2 Ball Mouse or Optical Mouse.