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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...
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