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Interfacing Max232 with stm32

Question asked by Nidhal Abidi on May 3, 2018
Latest reply on May 3, 2018 by Nidhal Abidi

I'm working with stm32vldiscovery and I'm going to use max232 for USART. 

I'm using usart1 (pA9 and pA10 as TX and RX).


The question is witch is the best way to make it wortk correctly and safetly specially with the RX pin in the STM32 cause

max232 has 5V as output then  the stm32 works with 3.3V. 


Should I use power divider or npn transistor with high frequency or .... ???