TP8452

The TP8452 Mouse Controller is specially designed to control PS/2 mouse device. This single chip can interface three key-switches and four photo-couples direct to 8042. TP8452 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 TP8452 accuracy. In the conventional mouse, a great number of noises are generated when the grid is partially closed or opened. These noises are usually mistaken for movement signals by conventional mouse controller and the cursor of the display screen is thus moved frequently up and down or back and forth. This will consumes a great amount of energy. The TP8452 PS/2 mouse controller provides noise immunity circuits to eliminate these noises in order to reduce energy consumption.

Using the auto-speed adjusting circuits, TP8452 promotes the power of the mouse in movement. when TP8452 moves at low speed, it will be very smooth. While at high speed, TP8452 can change the scanning ability of the motion and detects more dots than that of at low speed. According to different speed, the horizontal and vertical counters acquire different dots in the same distance.