UARTs and pin names


I’m looking @ the BB Black for a project. I need 4 UARTs for this, only one of which needs to have RTS CTS flow control.

The Black seems to fit the bill, but looking at in section 4.5 Serial UARTS the pins for UART5 are suffixed with a “+”. Anyone know why this is? I’m guessing it’s a potential conflict with another peripheral option.

One other thing I’m not 100% sure about is the GPIO pins have 8 different modes. I assume these can be set on a per-pin basis? (as opposed from choosing from one of 8 predefined sets for the whole chip)

If it’s relevant my overall requirement is:

USB host
microSD card
10 GPIOs
Audio (analog - will need to add codec)
No display