I am trying to interface the 8-pin bluetooth module Promi-ESD-02 with the Keil MCB2140 ARM7 board. The bluetooth module communicates with the MCU using UART (so I need to connect it to RxD0, TxD0 pins of the MCU).
My problem is that there are no jumpers for the RXD0, TXD0 or RXD1, TXD1 so that I can safely remove the MAX563 IC (that converts +/- 12V to logic levels) from the circuit. In other words, I can't connect the bluetooth module directly to the MCU pins.
I was thinking about Software UART. What other options do you recommend? I'm a student working on this project and I don't have price/performance limitations, or any other hw/sw tradeoffs restrictions.
P.S. : I've already written a UART0 module - COM0, so it there a possibility to use that?
Schematics: http://www.keil.com/mcb2140/mcb2140-schematics.pdf
Thank you