The max232 will generate 5 volt signal (transmit) and could damage serial pins of DSL502 CPU. Use a resistance divider to reduce 5 volt transmit of MAX232 to 3.3 volt. For receive MAX232 'understands' 3.3 signal also. Warm Regards,
Mukund Deshmukh, Director, Beta Computronics Pvt Ltd, 10/1 IT Park, Parsodi, Near VRCE Exchange, Nagpur -440022 Cell 9422113746
(MAX3232) to connect to a pc, but that device is not easily available. I used regular MAX232 and connected to the pc. Fire up minicom @ 38000bps u drop into sh.