Why do I receive an incorrect JTAG ID of 0xFFFFFFFF?. - Why do I receive an incorrect JTAG ID of 0xFFFFFFFF?. Description You could receive an incorrect JTAG ID of 0xFFFFFFFF if the TDO pin is not properly powered. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']