I want to use all the serial ports, but I am confused by the pinout. UART3 shows RTS/CTS. Where is the RX/TX?
For the existing layout, you cannot use all 5 ports. You can assign GP4-5 to either UART2 or UART3.
If you want to use UART3, you can tap it on the FPC connector (J9) but note that it is using 1.8v.
