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)