[Figure 1, callout 24]
JTAG configuration is provided through a dual-function FTDI FT4232HL USB-to-JTAG/UART bridge device (U8) where a host computer accesses the VCU128 board JTAG chain through a type-A (PC host side) to micro-AB (VCU128 board side J2) USB cable.
A 2 mm JTAG header (J4) is also provided in parallel for access by Xilinx® download cables, such as the Platform Cable USB II. JTAG initiated configuration takes priority over the configuration method selected through the FPGA mode pins M[2:0], wired to SW1 positions [2:4]. The JTAG chain of the VCU128 board is shown in the following figure.
Figure 1. JTAG Chain Block Diagram