ARTIX-7 FPGA Development Board AX7101 User Manual
J11 Expansion Header Pin Assignment
Part 3.7: JTAG Interface
A JTAG interface is reserved on the AX7101 FPGA carrier board for
downloading FPGA programs or firmware to FLASH. In order to prevent
damage to the FPGA chip caused by hot plugging, a protection diode is added
to the JTAG signal to ensure that the voltage of the signal is within the range
accepted by the FPGA to avoid damage of the FPGA chip.
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