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How to calculation UART bit transmitter and receiver time?

Question asked by Felix Hsu on Apr 22, 2018
Latest reply on May 10, 2018 by Carlos_Musich

Hi All

 

Hardware platform: i.MX7D

 

As below calculation is correct or not?

Thanks.

 

baud rate is 115200 / Tref_CLK is 24MHz (0.0416us)

 


UA1 Spec min= 1/115200 - 0.0416 = 8.6384 us

UA1 Spec max= 1/115200 + 0.0416 = 8.7216 us


UA2 Spec min = 1/115200 - 1/(16*115200) = 8.68 - 0.00000054 = 8.67999

UA2 Spec max = 1/115200 + 1/(16*115200) = 8.68+ 0.00000054 = 8.68000054

 

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