ZYNQ Ultrascale + FPGA Board AXU2CGA/B User Manual
Amazon Store: https://www.amazon.com/alinx
Figure 18-1: Clock Source
Clock Pin Assignment:
The level of PL_REF_CLK is +1.8V.
Part 19: ALINX Customized Fan Interface
The fan is powered by 12V, and the speed can be adjusted through the
FAN_PWM signal. For this board, will come with heatsink in fault, if you need
this fan, purchase separately.