Part 3.7: Crystal Oscillator On Core Board - Xilinx AV6045 User Manual

If you need to debug the core board separately, power the core board
through the Mini USB port (J2) of the core board, the Mini USB cable is
connected to the USB port of the computer.
the core board through the Mini USB port (J2), it cannot be powered through
the carrier board. Otherwise, current conflict may occur and the USB interface
of the computer may be burned out.

Part 3.7: Crystal oscillator on Core Board

The core board carries a 50M active crystal oscillator and a 27M active
crystal oscillator. The 50MHz clock is connected to the AB13 pin of the FPGA,
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FPGA Video Processing Development Platform AV6045 User Manual
Figure 3-6-1: Power input pin
Figure 3-6-2: Mini USB on the Core Board
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When the user supplies power to