SC84520
SC84520 is TWO IN ONE SCROLLING MOUSE CONTROLLER manufactured by Silan Microelectronics.
DESCRIPTION
The SC84520 Scrolling Mouse Controller id specially designed to control serial mouse or PS/2 mouse device. This single chip can interface three key-switched and 4 X-Y photo-couples plus Z-axis directly plus Z-axis directly to RS-232C or 8042 controller.
There are four types Z-axis inputs used to implement scrolling mouse functionality.
Features
- Using 50kΩ ± 1% resistor for RC oscillation
- patible with legacy PS/2 mouse
- patible with Microsoft serial scrolling mouse
- patible with Microsoft PS/2 scrolling mouse
- Serial or PS/2 port auto-detect
- 100 bytes Pn P ID code could be filled by code layer
- Built-in noise immunity circuit
- The sampling rate of motion detector is up to 65 k Hz
- Built-in three zener diodes : one in VDD to VSS, two in RTS to VDD
- CMOS push-pull RXD output
- Built-in current parator for photo-couples input
- Built-in three step dynamic input impedance
- Three key-switches...
