In the following situations, we are having JTAG connection problems with the i.MXRT1160 EVK board:
The below options are tried to make sure having problem with the EVK.
- Connecting JTAG with i. MXRT1160 EVK platform
- Before connecting to i. MXRT1160EVK platform, the JTAG shows green LED indications.
- After connecting JTAG to the platform, within a few seconds, the green LED turns orange.
- After that, JTAG stays with an orange light until unplugged from the board.
Once we get an orange LED indication in JTAG, we can’t connect or flash with JTAG.
- Erase flash through SPT and program a sample LED program.
- Just for checking, try to erase the already loaded program through the Secure Provisioning tool and the programmed sample LED program through SDP mode.
- After that, try to connect JTAG to the platform; again, the same issue is observed, like the JTAG LED turning orange.
- Erase flash through blhost - to make sure not having issue with software
- Erase complete flash through BLHOST
- Connected JTAG with i.MXRT platform & observed same issue.
After this issue, we can’t detect the hardware in SDP mode until the JTAG is unplugged from the device & vice versa.
Voltage measurement:
First, we thought there might be a problem with the board supply voltage, so we unplugged the JTAG and looked at the RESET pin (J1.15), which showed a 1.5Vdc voltage. The voltage level on the nSRST pin decreased to 0.5Vdc after re-connecting the JTAG, demonstrating that the board is constantly in a reset state. Due to this behavior, the green LED on the JTAG side changes from green to orange. As a result, we are unable to connect the JTAG to the board for flashing or other operations. This issue is present on all five EVK boards we have.
Attached video in the attachment.
Note: We attempted to connect via SDP mode, but the connection failed due to the low reset pin.
Also, tried by checking the 6sx board, we measured the 15th pin in the JTAG connector, and after connecting with the platform, it remains in green LED indication, and the voltage also remains at 3.0 volts.
