On Reference Manual RM0008, pag 186, bit 2, Alternate Function I/O Remap, it stats that the only available pairs for Usart 1 RX/TX can be PA9/PA10 or PB6/PB7, but on the pinout image for the same NUCLEO-F103RB the Usart 1 pinout is on PA2/PA3.Which o...