I am trying to flash STM32G431 (UFQFPN32 5x5) Other STM devices like x103 are flashing just fine, but this one fails.I even desoldered it from the actual project PCB, and hooked it up with the four SWD pins only, and still fail.the main difference ma...

The datasheet suggests load of 20pF .Due to size constraints, I hope to use https://jlcpcb.com/partdetail/318914-CSTNE8M00G550000R0/C341522Most 8Mhz resonators of this size seems to have 33pF

Do I understand the datasheet correctly when I believe the internal 2.1v reference is something internal, and the AD is still operating within VCC/3.3v as upper limit? Copilot suggested this:  // Enable ADC1 and configure itRCC->APB2ENR |= RCC_APB2EN...

This is on STM32F103C8 (bluepill)The A0 is connected to a voltage divider between bluepill's 3v3 and GND,And the output is very noisy. adding a delay did't do not much good```void setup(){Serial.begin(9600);// Enable ADC1 and configure itRCC->APB2ENR...

In order to make it easier for others to upload software, I decided to add the HID Bootloader:https://github.com/Serasidis/STM32_HID_Bootloader it is small and effiecient uploaded this to Bluepill (both jumpers in "0" position) $ ./STM32_Programmer.s...