2020-11-11 01:02 AM
Is it ok to connect boot0 from STM32 (with a 10k pulldown to GND) to one of pin 1 or 2 on STDC14 from STLINK-V3SET?
The pins are 'reserved' regarding to the STLINK-V3SET manual p. 23 with the comment 'Do not connect on target' ;)
The boot0 should be ignored in this case, but we need boot0 for an alternative device.
Thanks!
Solved! Go to Solution.
2020-11-11 07:03 AM
Actually PA7 is the SWD direction signal. PA7 high means SWD write, low means read.
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2020-11-11 02:03 AM
I checked on a V3 MOD board. There are internal connections on Pin 1/2 and, not like the for the other STDC14 pins, (obvious) 0-Ohm jumpers to isolate. So I would take the advice serious.
2020-11-11 02:36 AM
https://github.com/RadioOperator/CMSIS-DAP_for_STLINK-V3MINI/blob/master/STLINK-V3MINI/Adaptor/STLINK-V3MINI_GPIOs_v4.JPG
labels STDC14 Pin 1 as PB0, 3.3V output and Pin 2 as PA7. Info at your own risk!
2020-11-11 06:19 AM
Thank you for the information.
Yes, I also think to connect something else isn't good...
BTW: Without a connection I have measured on the STDC14 from the STLINK-V3SET:
Pin 1: 5 V
Pin 2: 3,3 V
