What power supplies are related to REFCLK buffers associated with high speed transceiver blocks in Stratix IV GX/GT devices? - What power supplies are related to REFCLK buffers associated with high speed transceiver blocks in Stratix IV GX/GT devices? Description The Stratix® IV GX/GT REFCLK buffer for the transceiver blocks are powered by VCCA (Analog Power) and VCCR (Receiver power). In addition, the VCCT (Transmitter power) provides the power to Inter Transceiver Block (ITB) clock lines used for REFCLK sharing. All power pins must be powered up as stated in the device Pin Connection Guidelines (PDF) . Custom Fields values: ['novalue'] Troubleshooting 0 False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 4.0 ['Stratix® IV GX FPGA'] ['novalue'] ['novalue'] ['novalue']