RM0366 Datasheet, PDF (736/868 Pages) STMicroelectronics – This reference manual targets application developers

RM0366
Universal synchronous asynchronous receiver transmitter (USART)
written). This means that it is not possible to receive synchronous data without transmitting
data.
The LBCL, CPOL and CPHA bits have to be selected when the USART is disabled (UE=0)
to ensure that the clock pulses function correctly.
Figure 284. USART example of synchronous transmission
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Figure 285. USART data clock timing diagram (M bits = 00)
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DocID025203 Rev 2
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