Abstract: To realize the FPGA on-orbit reconfiguration function of a CCD drive circuit of a spaceborne differential absorption spectrometer, an MCU-based ground verification method for on-board reconfiguration of an FPGA. The actual reconfiguration scheme is analyzed and a ground experiment scheme is proposed. The overall scheme is described from two aspects of hardware design and software design. Arter the test validation in the laboratory environment, it was found that the data sent and read back by the host computer were consistent and STM32 can simulate the JTAG protocol to load configuration data to the FPGA. Reconfiguration time can be shortened to 800 milliseconds. The design of hardware and software is reasonable and feasible. It can complete the modification of FPGA functions. This solution can provide a reference for the CCD driving circuit FPGA reconfiguration method.

Key words: optoelectronics, on-orbit reconfiguration, JTAG protocol, satellite-borne FPGA, STM32