FMC board card for realizing level transformation by using FPGA (field programmable gate array)

The invention relates to an FMC board card for realizing level transformation by using an FPGA (field programmable gate array). A unit for realizing level transformation by using FPGA is adopted between a DSP (digital signal processor) chip and an FMC connector assembly, so that low-speed single-end signals between the DSP chip and a bottom plate are connected through the FPGA. The FPGA comprises a voltage variable level interface connected with the FMC connector assembly and an LVCMOS (Low Voltage Complementary Metal Oxide Semiconductor) level interface connected with the DSP chip. Programming is performed through the FPGA, so that signals of a single-end signal group passing the voltage variable level interface are connected with DSP end signals at the LVCMOS level interface one by one, and the interactive communication between the DSP signals and the low-speed single-end signals of the bottom plate is realized. For the hundreds of DSP single-end signals, level transformation of multi-path signals can be realized just through an FPGA chip with small area and low cost, so that the area of a level transformation circuit is greatly reduced, and the requirements of small area of an FMC board card can be met. The problems that the signal interface level of the current FMC board card is fixed, the adaptability of the FMC board card to the bottom plate is poor, and the general level transformation chip cannot adapt to small area of FMC are solved.