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Q: What is BYPASS?
Answer:
BYPASS is mandatory IEEE 1149.1 JTAG instruction which bypasse device (i.e. device is not active in JTAG chain). The BYPASS instruction is always "all-ones" instruction in order to allow bypassing unknown devices. There are some very rare devices which do not support this instruction and they will not likely work in JTAG chain.Related links
- JTAGTest IEEE 1149.1 JTAG Boundary Scan Debugger / Tester
- ViaTAP, a high-speed JTAG-USB interface
- JTAG-related standards
SECONS Ltd. is not in any way connected with integrated circuit manufacturers and there is no any type of authorization, association or affiliation between SECONS and integrated circuit manufacturers. All information present in this FAQ is provided for informational purposes only, on "as-is" basis, and is intended to be useful and informative for SECONS customers.