2025-07-08 1:05 AM - last edited on 2025-07-08 1:23 AM by mƎALLEm
if in the stm32cubeide clock configuration the extrenal oscialtors aren't highlighted it means that i dont need extrenal oscialtor on my custom board?
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2025-07-08 3:40 AM - edited 2025-07-08 4:12 AM
If pwm is used for example to control motor speed, no need for crystal in that case. No need for crystal for i2c.
2025-07-08 1:22 AM
Hello @transistor and welcome to the ST community,
That depends on your application. For example, if you plan to use FDCAN interface you need a crystal.
Toggling a LED doesn't need a crystal. You can use HSI as a clock source.
2025-07-08 3:39 AM
i want to use i2c, pwm so the HSI should be enough?
2025-07-08 3:40 AM - edited 2025-07-08 4:12 AM
If pwm is used for example to control motor speed, no need for crystal in that case. No need for crystal for i2c.