The JTAG connections on the FPGA are wired directly to the expansion connector MC1 on the ECM1900 to facilitate FPGA configuration and ChipScope usage using a Xilinx JTAG cable. The JTAG interface presented at MC1 is a 1.8-V interface corresponding to the FPGA JTAG I/O voltage. An appropriate connector (such as a 2mm connector compatible with the Xilinx JTAG cable) would need to be wired on the peripheral attached to the XEM8350. Our BRK1900 has this connector and may be used as a reference.

The TMS, TCK, and TDI signals include on-board 4.7-kΩ pull-up resistors to 1.8V.

Refer to the ECM1900 Pins Reference for JTAG pin assignments on the MC1 expansion connector.