Hey Guys, Problem solved. The supply of 1.8V to the processor was ok when running without the PLL and MAM. When the PLL was added, the voltage fell to 1.3V. Thus leading to the strange operation. Just goes to show that when you are dealing with embedded processors you have to keep in mind both hardware and software. Thanks for the help!
Message
Re: Problem running LPC2106 with MAM, PLL and UART1 interrupts.
2006-04-27 by karlstiller