2022-06-07 07:16 AM
As soon as i configure PB4 as SPI1_MISO, I get disconnected from the target. Even the connection doesn't use the NJTRST pin.
It used to be a bug on the stm32L4, but I could't find it mention on the errata of the stm32U585.
Has anyone (ST) knowledge about that?
Best regards
Armin
2022-06-07 08:27 AM
Hi @aritec,
Can you give the Number of bug in errata sheet of STM32L4 please?
Thanks
Diane
2022-06-07 09:37 AM
Which STM32?
What debugging tools are you using?
JW
2022-06-07 10:08 AM
Segger J-Trace Pro
Segger Ozon V3.26f
2022-06-07 10:15 AM
Hi Diane,
it is 2.2.8 in ES0335 - Rev 15
2022-06-08 01:23 AM
The error "Full JTAG configuration without NJTRST pin cannot be used" has been there since the introduction of the STM32F1. Using SWD is recommended as workaround. I feel it is a pity, that such long standing bug do not cleaned up, at least with new designs.
2022-06-08 01:29 AM
Thanks ,
This bug is not directly related to the components (STM32U5, L4, F1,...) but to the JTAG, we recommend to use the SWD debug port instead of the full 4-wire JTAG port.
Best regards
DianeP
2022-06-09 05:39 AM
Sorry that this constraint is still present.
For the time being, we will update the STM32U5 errata sheet in order to inform users.
Stéphane