I am trying to interface with http://www.seeedstudio.com/depot/RS232-Shield-p-1910.html and MBED board. My question is where is VCC and GND that the shield is using? Moreover, does the Shield uses 5 or 3.3 Volts? How can I identify PINS 33-38? Where can I get data sheets so I can interface safely?
Thank you in advance