1,ACCURATE TIMING: The chip timer module can produce more accurate timing, especially for the LED industry 2,OUTPUT CLOCK: P3.3 is RSTOUT LOW, output low level after power on reset, low level or high level can be set by the software, the pin can be used as the reset circuit of 16 bit or 32 bit MCU, P3.4 can output system clock, can be used as the clock circuit of 16 bit or 32 bit MCU 3,SECURITY ENCRYPTION: The chip also has a strong encryption function, can replace the encryption chip, STC15F104W has no serial port and relay broadcast mode. Can simulate I2C, serial port and SPI, measure external voltage through IO port, and realize AD function 4,CONFIGURABLE I AND O: The input level of P3.1 directly outputs P3.0, which can be set in the download software, similar to the relay broadcast mode of serial port 1 of the 15 series 5,RELIABLE PCB: Adopt excellent PCB materials, with reliability and miniaturization, good maintenance and interchangeability Item Type: Microcontroller System Development Board Material: PCB Board Size: Approx. 12 x 18mm or 0.47 x 0.71in 4 x Control Board 4 x Pin Header Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.