Lpc2000

--- In lpc2000@yahoogroups.com, "extra300_it" <roberto.labaa@...> 
wrote:
>
> 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.
>

If you are using two PCs, the problem might be something to do with 
the three ground connections - PCs and board power supply.

Leon