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SC84502

PS/2 MOUSE CONTROLLER

Silan Microelectronics 

Silan

Semiconductors

SC84502

PS/2 MOUSE CONTROLLER

DESCRIPTION

The SC84502 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. SC84502 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.

In the conventional mouse, a great number of noises are

generated when the grid is partially closed or opened. These noise

are usually mistaken for movement signals by conventional mouse

controller and the cursor of the display screen is thus moved

frequently up and down or back and forth. This will consumes a great

amount of energy. The SC84502 PS/2 mouse controller provides

noise immunity circuits to eliminate these noise In order to reduce

energy consumption.

DIP-14

DIP-16

FEATURES

* Being compatible 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 12ms

* Through three key-switches input, SC84502 can exert seven

different output

* The motion detector of the SC84502 could sense 8m/sec

maximum with 200 DPI wheels

ORDERING INFORMATION

SC84502AP

SC84502BP

DIP-14 PACKAGE

DIP-16 PACKAGE

APPLICATIONS

* Optical mouse or pen-mouse

* Mechanical mouse or pen-mouse

* Optomechanical mouse or pen-mouse

* Mechanical track ball

* Optomechanical track ball

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0 2000.12.31

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