Learning FPGA is inseparable from the use of a programmer for downloading programs and debugging. FPGAs generally use the JTAG interface, and there are countless methods of converting USB to JTAG on the Internet. The simplest one is to directly use a USB to JTAG chip. The famous FT232H chip is used in the production of the FPGA programmer here. At the same time, for convenience, a position for the domestic chip CH347T is reserved on the board. Friends who support domestic products can solder 347 for use. Attached here is the schematic diagram, PCB and related files of the USB-JTAG programmer drawn by LiChuang EDA. I will not go into details about its working principle here, and you can see it by looking at the datasheet. It has been verified that this circuit board can achieve the same function as a programmer that costs more than 100 yuan on Taobao. The burning speed will be slower in theory due to the poor performance of the isolation chip, but it is not felt in use.
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