DESCRIPTION

The SC83702 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 SC83702 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 650mm/sec without missing a dot in microsoft mode, and the scanning speed can up to 770mm/sec in mouse system mode.

FEATURES

• Built-in two zener diode between VDD and VSS, RTS and VDD
• Built-in noise immunity circuit
• CMOS DIP 16 pins package&SOP 16 pins package
• Low power dissipation
• Use 32.768KHz 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 13ms
• Through three key-switches input, SC83702 can exert seven different output
• The sampling rate of motion detector is 65KHz

APPLICATIONS

• Optical mouse or pen-mouse
• Mechanical mouse or pen-mouse
• Optomechanical mouse or pen-mouse
• Mechanical track ball
• Optomechanical track ball