KCU105 Board FMCH VADJ Adjustment - 3.2 English

HDMI 1.4/2.0 Transmitter Subsystem Product Guide (PG235)

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3.2 English

The KCU105 board system controller must apply power to the VADJ power rail for the HDMI 2.0 FMC card (TB-FMCH-HDMI4K). Most new boards are per-programmed and should be detected. The VADJ is powered when the DS19 LED (located near the power switch on the KCU105 board) is ON.

If an older version KCU105 board is used, or the board is not properly programmed upon receiving, you must manually set the VADJ power rail to 1.8V for the HDMI 2.0 FMC card prior to bitstream configuration.

Perform these steps to set the VADJ power rail through the UART terminal are:

  1. Connect a USB cable between the USB UART connector of the KCU105 board and a PC running Windows.
  2. Use the Windows Device Manager to determine which virtual COM port is assigned to the UART for the AMD Zynq™ 7000 SoC system controller and which is assigned to the UART for the AMD UltraScale™ device. In the list of COM ports in the Device Manager window, the enhanced COM port associated with the CP210x, is the one connected to the KCU105 board system controller and the standard COM port is the one connected to the device UART.
  3. Open a terminal window (115200, 8, N, 1) and set the COM port to the one communicating with the KCU105 board system controller.
  4. After the UART terminal is connected, power cycle the KCU105 board to refresh the system controller menu in the UART terminal. Select this option in the system controller menu:
    1. Adjust FPGA Mezzanine Card (FMC) Settings.
  5. In the next menu, select:
    1. Set FMC VADJ to 1.8V.

      Important: Ensure that the jumpers are set correctly on their HDMI 2.0 FMC daughter card.