Lpc2000

Hi,

I am using an LPC2129. My VPBDIV is set to '1'. I have been using 
EINT2 without a problem. I am able to set EXTPOLAR and EXTMODE 
without a problem. I am aware of the known errata about VPBDIV and 
EXTPOLAR so I set EXTPOLAR like this:

SCB_VPBDIV = 0 // first you set VPBDIV to 0
SCB_EXTPOLAR = 0x4;  // then set your EXTPOLAR bit
SCB_VPBDIV = 1;   // now, set VPBDIV back to what it originally was

Life is good when I do this. The problem is when I want to use EINT0 
and when I set EXTPOLAR for EINT0 to 1 my system appears to hang and 
I get no more serial port output. I set EXTPOLAR for EINT0 like this:

SCB_VPBDIV = 0
SCB_EXTPOLAR = 0x1;
SCB_VPBDIV = 1;

.. but when I run my code I lock up. I can set EXTPOLAR to 0x2, 0x4, 
or 0x8 but NOT 0x1. If I comment out these lines my code will 
continue.

Can someone help me with this? Am I not doing this correctly? Please 
help me set EXTPOLAR to 1 for EINT0 when I have a VPBDIV of 1.

Thanks,
Todd