DESCRIPTION
The SC84510 Scrolling Mouse Controller is specially designed to control PS/2 mouse device. This single chip can interface three key switches four photo-couples plus x-axis direct to 8042 controller.
SC84510 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.

FEATURES
* Using 50k ±5% resistor for RC oscillation.
* Compatible with legacy PS/2 mouse.
* Compatible with Microsoft scrolling mouse.
* Built-in noise immunity circuit.
* Built-in current comparator for photo-couples input.
* Built-in three steps dynamic input impedance.
* Three key-switches and four photo-couples inputs.
* Both key-press and key-release debounce interval 12 ms.
* The sampling rate of motion detector is about 65KHz.
* Low power dissipation.
   * Six types Z direction input:
      1. Photo couples input. (Z/1)
      2. Key-switches input.
      3. Voltage-sensing input.
      4. Mechanical input. (Z/1)
      5. Photo couples input. (Z/4)
      6. Mechanical input. (Z/2)