Arduino for STM32

Thanks. I found in the datasheet that PA9 and PA10 TX1 and RX1 fall under "alternate function" and PB6 and PB7 fall under "remapped".

I don't understand the difference completely, but can I assume that normally, PA9 and PA10 will be used for serial and PB6 and PB7 are free to use as gpio? Unless I ...

Hello all,

I recently ordered a couple of STM32F103C6T6. This is my first project with the STM32. I have been using Arduino and ESP8266 until now.

While creating my schematic, I noticed there are 3 pins labeled as RXD1: https://www.mischianti.org/wp-content/uploads/2022/02/Pinout-STM32-STM32F1 ...