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 .... ???