EM84510FP

The EM84510 mouse controller supports two types of Z direction inputs: Z/1, which is one dot per count, and Z/2, which is two dots per count. These are counted by Z2 changing phase.

The purpose of the EM84510 Scrolling Mouse Controller is to control a PS/2 mouse device. It is designed to interface three key-switches, four photo-couples, and a z-axis directly to the 8042 controller. The controller can receive commands and echo status or data formats compatible with IBM PS/2 modemouse. It also includes a key debouncing circuit to prevent false entries and improve accuracy. Additionally, the controller provides noise immunity circuits to eliminate noises that can be mistaken for movement signals, thus reducing energy consumption.

The debounce interval for key-press in the EM84510 mouse controller is 12 ms .