The eKM6251 is standard RF Mouse Receiver (Rx) Controller for USB and PS/2 compatible
interface.

It’sreceives the RF packet data fromRF Rx module (circuits). And decode the RF packet
data and transmitting the data to PC by USB or PS/2 interface.

The eKM6251 have internal EEPROMto storage the Device ID, do not need the external storage device like 93C46. It’shave built-in RF signal sampling and noise immunity function to improve the RF data decode efficiency.