I want to set up the MCB900 to use an external oscillator (12MHz),but I can't assign any values to the UCFG1 register to set up FOSC..How do I access UCFG1 to set the ext. osc, and do I have to configure P3.0 and P3.1?
Is this not just a continuation of your existing thread:
http://www.keil.com/forum/docs/thread8954.asp