![]() ![]() Tigard-Powered: Set the switch to a voltage, and connect the VTGT to the unpowered target.Target-Powered: Set the switch to VTGT and connect the VTGT wire to the powered target.VTGT disconnects the VTGT pin from supplies, and depends on the wire connected to the target to set the level shifter voltage.1V8, 3V3, and 5V all apply a voltage to the VTGT pin.This switch chooses the reference voltage for the level shifters and the target system: Details are in each of the interface sections further below, but here is a summary of the modes and their uses: Voltage Switch Both need to be set properly for a specific use mode. One controls voltage, one controls how several of the IO pins are wired. There are two switches on Tigard to set the mode of operation. If not, you can now select your voltage with the voltage switch If you connected VTGT to your target, the VTGT LED will illuminate.Ensure that the voltage switch is in VTGT mode.Select the correct mode either SPI/JTAG or SWD/I2C.Connect board to target system with clips or jumper wires.Starting with the board completely disconnected: Logic analyser port to observe device-level signals (v1.0 and later).Switch to choose between SPI/JTAG and I2C/SWD modes.Switch to choose between on-board 1.8, 3.3, and 5.0v supplies and vTarget.High-performance directional level shifters for 1.8 to 5.5v operation.Dual-port, with one dedicated to UART and the second shared with other interfaces.Flashrom, libmpsse, pyftdi and other tools for SPI interfaces. ![]() In general, Tigard was designed to work as-is with several tools and libraries that already support the x232H family of chips. JTAG Boundary Scan (on JTAG or CORTEX header).The two exceptions are the Exodus Intellegence Hardware Interface Board which is not open hardware or commercially available, and TIMEP which is the origin and heritage of this project. There are plenty of -232H series breakout boards, but they are generally designed to be an easy way to adapt it to a specific use, and not designed for regularly plugging in to all different target systems. An FTDI FT2232H-based multi-protocol tool for hardware hacking. ![]()
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