I am using a Segger JLink Pro. It is connected to an NXP iMX RT 1064 MCU.
When I use J-Flash, v6.88c and connect, I get the following.
Connecting ...
- Connecting via USB to probe/ programmer device 0
- Probe/ Programmer firmware: J-Link Pro V4 compiled Nov 12 2020 10:08:03
- Device "MIMXRT1064XXX6A" selected.
- Target interface speed: 4000 kHz (Fixed)
- VTarget = 3.313V
- InitTarget() start
- InitTarget()
- _TargetHalt: CPU halted
- InitTarget() end
- Found SW-DP with ID 0x0BD11477
- DPIDR: 0x0BD11477
- Scanning AP map to find all available APs
- AP[1]: Stopped AP scan as end of AP map has been reached
- AP[0]: AHB-AP (IDR: 0x04770041)
- Iterating through AP map to find AHB-AP to use
- AP[0]: Core found
- AP[0]: AHB-AP ROM base: 0xE00FD000
- CPUID register: 0x411FC271. Implementer code: 0x41 (ARM)
- Found Cortex-M7 r1p1, Little endian.
- FPUnit: 8 code (BP) slots and 0 literal slots
- CoreSight components:
- ROMTbl[0] @ E00FD000
- ROMTbl[0][0]: E00FE000, CID: B105100D, PID: 000BB4C8 ROM Table
- ROMTbl[1] @ E00FE000
- ROMTbl[1][0]: E00FF000, CID: B105100D, PID: 000BB4C7 ROM Table
- ROMTbl[2] @ E00FF000
- ROMTbl[2][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS-M7
- ROMTbl[2][1]: E0001000, CID: B105E00D, PID: 000BB002 DWT
- ROMTbl[2][2]: E0002000, CID: B105E00D, PID: 000BB00E FPB-M7
- ROMTbl[2][3]: E0000000, CID: B105E00D, PID: 000BB001 ITM
- ROMTbl[1][1]: E0041000, CID: B105900D, PID: 001BB975 ETM-M7
- ROMTbl[1][2]: E0042000, CID: B105900D, PID: 004BB906 CTI
- ROMTbl[0][1]: E0040000, CID: B105900D, PID: 000BB9A9 TPIU-M7
- ROMTbl[0][2]: E0043000, CID: B105F00D, PID: 001BB101 TSG
- Cache: Separate I- and D-cache.
- I-Cache L1: 32 KB, 512 Sets, 32 Bytes/Line, 2-Way
- D-Cache L1: 32 KB, 256 Sets, 32 Bytes/Line, 4-Way
- Executing init sequence ...
- Initialized successfully
- Target interface speed: 4000 kHz (Fixed)
- Found 1 JTAG device. Core ID: 0x0BD11477 (None)
- Connected successfully
About 10 seconds later I get this message
WARNING: Supply voltage too low or too high, disconnecting target! VTarget = 0.000V
Disconnecting ...
- Disconnected
Monitoring the Vref signal does show a drop in voltage.
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Hl5qz1vK+M8zUjWztMsxzmawnmaka1+niZJcx3KnTRXo2Sa0GW8JClLX0oskU60y5NuYrXyxFrLQ6yUyH8sem39ja/yPbRfVFQUbWFhIS75cSz/m5NYv8rP8jJ8HFxDamF+Li4pLzUoFSuSZnmQNB2SZiSrSXOjrfeKQOmk/mNKGgjlsmPHDldBlGx6Kt+Xl9T2UFVVZdNluMymGoUrjZjIRl9Ji6QZ2fJJc9/+A0FJs7a23iYn870xFIsVVlNT6+KwNTeGUAXFobrGpqYm4pJ8KhYrbVt1tUua+Y5DRUWVVZVKNjM9GZfkk4brK13jYWZ6Ki7Jp8rKkm9IzcxszTgwEQgAgEAMz64Dw7MRLtgeYSJQJIsXbC8HhmcjW314lp4mAACBSJoAAAQiaQIAEIikCQBAIJImAACBSJoAAAQiaQIAEIikCQBAELP/B7kwKTEsAEHSAAAAAElFTkSuQmCC[/img]
However if Vref is monitored without J-Flash connected, there is no voltage drop.
The connected device is running, but 'idle'.
There are two JTracePros connected, both via USB. The connection is a 10-pin connector using the 20-pin to 10-pin adapter.
Any help on how to determine what is causing the voltage drop would be helpful.
Keith Smith
When I use J-Flash, v6.88c and connect, I get the following.
Connecting ...
- Connecting via USB to probe/ programmer device 0
- Probe/ Programmer firmware: J-Link Pro V4 compiled Nov 12 2020 10:08:03
- Device "MIMXRT1064XXX6A" selected.
- Target interface speed: 4000 kHz (Fixed)
- VTarget = 3.313V
- InitTarget() start
- InitTarget()
- _TargetHalt: CPU halted
- InitTarget() end
- Found SW-DP with ID 0x0BD11477
- DPIDR: 0x0BD11477
- Scanning AP map to find all available APs
- AP[1]: Stopped AP scan as end of AP map has been reached
- AP[0]: AHB-AP (IDR: 0x04770041)
- Iterating through AP map to find AHB-AP to use
- AP[0]: Core found
- AP[0]: AHB-AP ROM base: 0xE00FD000
- CPUID register: 0x411FC271. Implementer code: 0x41 (ARM)
- Found Cortex-M7 r1p1, Little endian.
- FPUnit: 8 code (BP) slots and 0 literal slots
- CoreSight components:
- ROMTbl[0] @ E00FD000
- ROMTbl[0][0]: E00FE000, CID: B105100D, PID: 000BB4C8 ROM Table
- ROMTbl[1] @ E00FE000
- ROMTbl[1][0]: E00FF000, CID: B105100D, PID: 000BB4C7 ROM Table
- ROMTbl[2] @ E00FF000
- ROMTbl[2][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS-M7
- ROMTbl[2][1]: E0001000, CID: B105E00D, PID: 000BB002 DWT
- ROMTbl[2][2]: E0002000, CID: B105E00D, PID: 000BB00E FPB-M7
- ROMTbl[2][3]: E0000000, CID: B105E00D, PID: 000BB001 ITM
- ROMTbl[1][1]: E0041000, CID: B105900D, PID: 001BB975 ETM-M7
- ROMTbl[1][2]: E0042000, CID: B105900D, PID: 004BB906 CTI
- ROMTbl[0][1]: E0040000, CID: B105900D, PID: 000BB9A9 TPIU-M7
- ROMTbl[0][2]: E0043000, CID: B105F00D, PID: 001BB101 TSG
- Cache: Separate I- and D-cache.
- I-Cache L1: 32 KB, 512 Sets, 32 Bytes/Line, 2-Way
- D-Cache L1: 32 KB, 256 Sets, 32 Bytes/Line, 4-Way
- Executing init sequence ...
- Initialized successfully
- Target interface speed: 4000 kHz (Fixed)
- Found 1 JTAG device. Core ID: 0x0BD11477 (None)
- Connected successfully
About 10 seconds later I get this message
WARNING: Supply voltage too low or too high, disconnecting target! VTarget = 0.000V
Disconnecting ...
- Disconnected
Monitoring the Vref signal does show a drop in voltage.
[img]data:image/png;base64,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[/img]
However if Vref is monitored without J-Flash connected, there is no voltage drop.
The connected device is running, but 'idle'.
There are two JTracePros connected, both via USB. The connection is a 10-pin connector using the 20-pin to 10-pin adapter.
Any help on how to determine what is causing the voltage drop would be helpful.
Keith Smith