Lpc2000

When I set up an external edge sensitive interrupt EINT3 on an 
lpc2129 all sorts of problems happen. The jtag stops working and 
won't work again until I reprogram through the ISP.

The pin is sitting stable at about 2.8 volts when I run the following 
code. If I set up for level sensitive it is ok.

// initialise pin 0.30 (EINT3) to have a negative edge 
// triggered interrupt

PINSEL1_bit.P0_30=0x2; 
EXTMODE = 0x08;

// enable the interrupt control	
VICIntSelect &= ~(1<<VIC_EINT3);  // IRQ on external interrupt
VICVectAddr3 = (uint32_t)&ShutdownRamInterrupt;
VICVectCntl3 = 0x20 | VIC_EINT3; // vector interrupt for external 3
VICIntEnable = (1<<VIC_EINT3);    // Enable external 3 interrupt.
		
Anybody used EINT3 edge sensitive on an lpc2129

thanks Doug