The JTAG-HS1 programming cable is a high-speed programming solution for Xilinx FPGAs. It is compatible with all Xilinx tools, including iMPACT, Chipscope, and EDK. The HS1 attaches to target boards using Digilent’s 6-pin, 100-mil spaced programming header, or Xilinx’s 2x7, 2mm connector (using the included adaptor).The JTAG-HS1 is powered from a PC’s USB port. The HS1 can be seamlessly driven from Xilinx’s iMPACT software or from Digilent’s Adept software. It will be recognized as a Digilent programming cable when connected to a PC, whether or not it is attached to the target board. A separate Vdd pin is provided on the HS1 to supply JTAG signal buffers. These high speed, 24mA, three-state buffers allow target boards to use JTAG signal voltages from 1.8V to 5V, with bus speeds of up to 30MBit/sec. The HS1’s Vdd pin must be tied to the same voltage supply that drives the JTAG port on the FPGA.