Description

STM32G431RB clocking! What clock (/crystal) do we need, what are the different options?

Tasks

(Finish by May 25th, 2024)

[x] Research what is STM32G431RB (RCC) Clock
[x] Find different options for STM32G431RB Clock (Can try looking at schematics)
[x] Difference between HSI48 amd HSE (Internal vs external oscillators)(https://electronics.stackexchange.com/questions/401594/difference-between-internal-and-external-oscillator-for-a-microcontroller)
[x] Compare the properties and choose the most optimal
[ ] Research components to add to the chosen crystal oscillator
[ ] Find off the shelf products for the components

2024-05-28

STM32G431RB Research:

STM32G431RB microcontrollers embed 3 internal oscillators, 2 oscillators for an external crystal or resonator, and one phase-locked loop (or PLL).
The RCC manages three types of resets: the system reset, the power reset and the backup domain reset.
The peripherals have individual reset control bits.

ALL CLOCKS OPTIONS

COMPARING 2 FASTEST CLOCKS

Clock Options	Speed	Oscillator Type	Pros	Cons	Other notes
HSI48	48 MHZ	Internal	Reliable*	Not Accurate	- The HSI48 is not supported by the STM32F3.

HSE	4-48 MHz	External	Clock Security System (CSS)**Accurate		- Can achieve up to 40 MHZ in Bypass mode