Low Emi Mouse And Keyboard Control Chip Design

In order to meet the requirements of keyboard and mouse constantly update and more and more high performance requirements of IC by the manufacturers, this article introduces a typical design and development for the keyboard or mouse application. The 8051 MCU is determined as the control core for the system. And FLASH is used for system program storage. Peripheral configuration of the power management, clock management, reset control, timer, multi-mode serial output, and analog-digital conversion and other functional modules. According to the concerned requirements of low electromagnetic radiation by the manufacturers, decreasing the peak current of the synchronous circuit and the flipping of the pins of IC is the best choose. Simulation and experimental results show that the decreasing of the peak current can reduce electromagnetic radiation and show high performance in the keyboard and mouse application system。...