His motivation in working on the new scheduler was to create a completely o (1) scheduler for wakeup, context-switch, and timer interrupt overhead.

The controllable silicon circuit controlled by monolithic microcomputer is introduced, which adopts external interrupt to obtain sync signals and controls conducting angel with a timer.

Based on the principle of UART, a software method has been presented for asynchronous communication by using interrupt program of timer, and has been implemented in an application project.