farhang_760
Newbie level 6
Hi, I want to connect 2*16 LCD (with +5v logic) with STM32 (e.g. f030) microcontroller, as you know the GPIO output voltage is 3.3V. i found a schematic as you see below:
you see that except +5V power port all of them pull up with external resistor. is it correct? i heard from someone that we could connect them directly to stm32 without any pullup resistor,is it works?
another way is using BJT to connect 3.3v gpio to 5v signal whats your idea?
you see that except +5V power port all of them pull up with external resistor. is it correct? i heard from someone that we could connect them directly to stm32 without any pullup resistor,is it works?
another way is using BJT to connect 3.3v gpio to 5v signal whats your idea?