Lpc2000

Hello,

I am experincing a strange problem on a LPC2212.
Sometimes, after board power-up, the micro does not start at all and 
seems to remain in a pseudo-reset state (all pins in high-z).
The software execution seems not to start at all, since one of the 
first thing done is to program some of the GPIO as outputs.
I checked the state of the BOOT pins related to RESET pin and power 
supplies but everything seems to be ok.
RESET is released when all the configuration pins are in the correct 
position.
JTAG pins are polarized with pull up/down resistors.

The problem seems to be somehow related to the UART0 (the problem 
appears when the board is connected to a PC through a serial cable).

Any suggestion will be greatly appreciated.

Thank you.