USART3 voltage level

[Manikandan K]

Posted on April 04, 2018 at 22:31

I'm using STM32F207ZG ,What is maximum Voltage level at Tx and Rx pin in USART3? Can I use 5V CP2102  USB to TTL converter with STM32F207ZG?

[Tesla DeLorean · Accepted solution]

Posted on April 04, 2018 at 22:42

The Data Sheet should indicate if specific pins are FT (Five Volt Tolerant)

http://www.st.com/content/ccc/resource/technical/document/datasheet/bc/21/42/43/b0/f3/4d/d3/CD00237391.pdf/files/CD00237391.pdf/jcr:content/translations/en.CD00237391.pdf

 

[T J]

Posted on April 05, 2018 at 07:59

the CP2102 that I use is 3V = 3.6V

https://www.digikey.com.au/products/en/integrated-circuits-ics/interface-controllers/753?k=cp2102

 

I connected it directly, but as a 3V unit.