Silan
Semiconductors
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.
SC84502
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
1
SILAN [ SILAN MICROELECTRONICS JOINT-STOCK ]
