... buzzer, the five users LED lights, a power indicator light, a USB communication indicator, four user keys, a system reset button * Power ... .54MM,Rich in routines, not only functional modules MDK-board test-source: LED lights into the water six examples, RTC, ... , DAC, 12C, RS232, RS485 pass, CAN, touch-screen test, TFT LCD screen test ..... but also there are successful transplantation UCOS2, UCGUI a ...