Synchronous 422-to-USB module and converter based on HDLC protocol

The invention discloses a synchronous 422-to-USB module and a converter based on an HDLC protocol. The module comprises an FPGA system, a synchronous 422 differential driving circuit and a USB driving circuit. The FPGA system comprises an FPGA chip, a crystal oscillator circuit and a reset circuit, and the crystal oscillator circuit and the reset circuit are respectively connected with the FPGA chip; the synchronous 422 differential driving circuit and the USB driving circuit are respectively connected with the FPGA chip, and the USB driving circuit outputs serial port data and clock signals generated by the FPGA chip as differential signals of the USB through an interface conversion chip; and the synchronous 422 differential driving circuit outputs serial port data and clock signals generated by the FPGA chip as synchronous 422 differential signals through a differential driving chip. According to the single-channel synchronous 422 to USB module based on the HDLC protocol, a controller is an FPGA. Compared w