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Clock source for USART3/4 IN STM32G070
STM32G070. It is said there are 4 USARTS in the datasheet. For USART3/4, there is no place talking about the clock source for them. Would you please tell us what's the clock source for the USART3/4?
waclawek.janBest answer
Super User
Apr 17, 2019 10:29 AM UTC
From RM0444, USART block diagram subchapter:
When the dual clock domain feature is disabled, the usart_ker_ck clock is the same as the usart_pclk clock.
(and from the table in USART implementation subchapter, USART3/4 don't have the dual clock domain feature).
In other words, USART3/4 are clocked from the respective APB clock.
JW