Features: Carefully optimized circuit, communication rate up to 12Mbps TTL compatible with 5V level Onboard DC 5V power interface, 500MA current output, improve load capacity. Onboard EROM, which can be configured to JRAG/SPI and other interface forms through FT PROG software. All available IOs are all exported. Each serial port has an independent transceiver indicator LED, which is convenient to observe the status of the serial port Immersive gold PCB, lead-free process, with M3 mounting screw holes Four serial ports are connected at the same time, you can observe data at the same time Interface Description: VCC: power supply (5.0V) RXD: The receiving pin of the module's own port (TTL level, not directly connected to RS232 level) can be connected to the TXD of the MCU TXD: The receiving pin of the module's own port (TTL level, not directly connected to RS232 level) can be connected to the RXD of the MCU GND: Ground