The JTAG-SMT1 is a compact, complete and fully self-contained surface-mount programming module for Xilinx FPGAs. It can be accessed directly from all Xilinx tools, including iMPACT, Chipscope, and EDK. The module can be loaded directly onto a target board and reflowed like any other component.The JTAG-SMT1 uses a 3.3V main power supply and a separate Vref supply to drive the JTAG signals. All JTAG signals use high speed, 24mA, three-state buffers that allow signal voltages from 1.8V to 5V and bus speeds of up to 30MBit/sec. JTAG signals are actively driven only during a programming event and are otherwise held in high-impedance, so the JTAG bus can be shared with other devices.