EM83702

ALL IN ONE MOUSE CONTROLLER

1

* This specification are subject to be changed without notice.

4.15.1996

EM83702

ALL IN ONE MOUSE CONTROLLER

GENERAL DESCRIPTION

The EM83702 Mouse Controller is specially designed to control mouse device. This single chip can interface

three key-switches and four photo-couple direct to RS-232C. The EM83702 does not need any external power

supply,so the mouse can go without a power line. It is versatile with both microsoft and mouse system.

Debouncing circuit were provided to prevent false entry and to improve the accuracy. In 1200 baud rate non-auto

speed with 200 DPI wheels and photo-couples, the scanning is 650 mm/sec without missing a dot in microsoft

mode,and the scanning speed can up to 770 mm/sec in mouse system mode.

FEATURES

• Built-in two zener diode between V

DD

and V

SS

, RTS and V

DD

.

• Buit-in noise immunity circuit.

• CMOS DIP 16 pins package & SOP 16 pins package.

• Low power dissipation.

• Use 32.768 kHz crystal or 3.58MHz resonator.

• Oscillator circuits on-chip.

• Serial output in 1200 baud rate.

• Can be powered directly from RS-232C.

• Can drive directly to RS-232C.

• Three key-switches and four photo-couples inputs.

• Both key-in and key-release debounce interval 13 ms.

• Through three key-switches input, EM83702 can exert seven different output.

• The sampling rate of motion detector is 65 KHz.

APPLICATIONS

• Optical mouse or pen-mouse

• Mechanical mouse or pen-mouse

• Optomechanical mouse or pen-mouse

• Mechanical track ball

• Optomechanical track ball

Patent Number : 38715, 95661 (R.O.C)

Patent Pending : 84200836 (R.O.C)