In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:

If you're going through an inverter (e.g. MAX232) you do need to set the baud mode to True, like this:

[code]Baud    CON    "T9600"[/code]

If you're going direct (possible, but not always reliable) you need to use iNverted mode:

[code]Baud    CON    "N9600"[/code]

Once Baud is defined it's just a matter of using SERIN and SEROUT.  Note: If you want to use a direct connection for SERIN from a PC, you need to put a 22K resistor between the PC's TX pin (pin 3 on a DB-9) and your SX I/O pin.  This resistor isn't required with the MAX232 circuit.

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