In order to solve the problem that the universal RS422/485 serial interface board based on PCIe bus cannot be completely localized,a multi-channel isolated serial port board based on Fudan Micro JFM7K325T high-performance FP-GA is designed to realize PCIe bus control and UART serial port control through logic.Module includes FPGA circuit,power circuit,isolated RS422/RS485 interface circuit,FPGA logic,the upper computer through the PCIe bus to achieve multi-channel serial interface date transceiver.The actual test results show that the multi-channel serial interface can realize the common baud rate continuous reading and writing,and the data is stable and each channel is electrically isolated.The device is stable and reliable in application.
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