How does the Detect JTAG Chain feature (JTAG menu) detect the devices in a JTAG chain? - How does the Detect JTAG Chain feature (JTAG menu) detect the devices in a JTAG chain? Description The MAX PLUS® II software uses the following sequence to detect the devices along a JTAG chain: Measures the instruction register length by shifting a very long string of 1s into the instruction register, then counting a long string of "0"s to replace the "1"s. Verifies the chain by placing each device into BYPASS mode. Related Articles How is a blind interrogation of the devices in a JTAG chain accomplished? Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']