SGPIO (serial general purpose I/O) is a unique peripheral which can be used to emulate communication protocols using either serial or parallel transmission lines.
This example has been tested on a Keil MCB4300 board, using a Ulink2 debug probe.
No specific modifications to the board are required.
Since the interface is tested in loopback mode, the MOSI output needs to be connected externally to the MISO input via an external wire.
All required SGPIO pins can be found on the MCB4300 prototype connectors.