Translation - Japanese: FX3をJTAGデイジーチェーンに接続 – KBA231365 - Community Translated (JA)
Question: Is it possible to connect FX3 to the JTAG daisy chain with other chips?
Answer: Yes, FX3 can be connected to the JTAG daisy chain while other devices are connected.
The JTAG interface on FX3 is used to debug the firmware through the CPU core's on-chip debug circuitry. The JTAG pins are
directly connected to the Arm® CPU, and they do not support boundary scan.
See this thread where customer has successfully debugged two FX3 chips connected in JTAG chain.
For more details on the FX3’s JTAG interface, see section 220.127.116.11 of the FX3 Technical Reference Manual.