STM32L496 VDDIO2 / GPIOG pins

Pavel Krupets · ‎2018-10-29

1. Do I need to provide power from different regulator for VDDIO2 pins or if I use the same level (3.3V) can I use VDD? I simply need lots of GPIO pins.

2. LL_PWR_EnableVddIO2 has no effect in my case. IsEnabledVddIO2 always returns 0. I did wait for PVMO2 to reset before enabling VDDIO2.

I also tried my code on NUCLEO 144 STM32L496ZG. It doesn't work there either.

Am I missing something?

Pavel Krupets · ‎2018-10-30

Oh. Lame. I screwed up. I forgot:

LL_APB1_GRP1_ EnableClock(LL_APB1_GRP1_PERIPH_PWR);

Well if you run into problem lile this check clocks 1st. I started with checking if all pins were soldered properly and if power gets everywhere. ROFL.