The Joint Test Action Group (JTAG)-SMT4 is a compact, complete, and fully
self-contained surface-mount programming module for Xilinx
field-programmable gate arrays (FPGAs). The module can be accessed directly
from all Xilinx Tools, including Vivado, and Vitis. Users can load the
module directly onto a target board and reflow it like any other component.
The JTAG-SMT4 uses a 3.3V main power supply (VDD) and an independent 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 3.3V, and bus
speeds up to 30MBit/sec. The UART signals are driven directly by the USB
controller (referenced to the 3.3V VDD supply) and support bus speeds up to
12Mbaud. The JTAG bus can be shared with other devices as the SMT4 signals
are held at high impedance, except when actively driven during programming.
The SMT4 module is CE certified and fully compliant with EU RoHS and REACH
directives. The module routes the USB D+ (DP) and D- (DM) signals out to
pads, providing the system designer with the ability to choose the type of
USB connector and its location on the system board.