Hi All,
My board is built on the STM32F746IG.
Some time after the launch of the firmware (3 different firmware) access via SWD is unavailable.
Stm32_Link_Utility reports:
- Core is held in reset
- Can not connect to target!
.....
.....
Vnrst = 0.3 V, despite the connection to Vcc through resistor.
When I select the "Hot plug" mode, I can connect, but the flash is not available and cannot be erased.
This goes on for a long time.
I turn off the power. I measure the resistance of the line nrst.
Sometimes I just wait a long time 🙂
The board is again available, within an hour or two:
Vnrst = 2.98 V
The firmware works.
After some time, the problem repeats.
