Application of external interrupt 0 of LPC2214 chip-EEWORLD

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Because I didn't see an error correction file from NXP at first, I set P0.16 to external interrupt 0. It took me a long time to solve such a simple problem, which was really painful. I wrote it down here so that my colleagues can have a chance to refer to it. Although I still can't fully grasp it, it can be used in my current project. In this project, I only turn on external interrupt EINT0, and the other external interrupts are not used.

The first thing to do is to understand the part about EINT1 in the LPC_2212_2214_err.pdf file. In this part, there is an example as follows:

VPBDIV=0;
EXTMODE=0x01;
VPBDIV=1;
VPBDIV=0;
EXTPOLAR=0x01;
VPBDIV=0x01;
VPBDIV=0;

But I still can't interrupt when I press this, and I still don't know the reason. I hope friends who know can tell me. I made the following settings to make it work.

VPBDIV=0;
EXTMODE=0x03;
VPBDIV=1;
VPBDIV=0;
EXTPOLAR=0x03;
VPBDIV=0x01;
//VPBDIV=0;

Set EINT1 to interrupt on rising edge, then it will be OK. Of course, the EINT1 pin does not need to be set, and the interrupt does not need to be set, so that the requirements can be met.

Looking at the error correction folder, 0x01 and 0x0d are set to 0x00, so the only value that can be set is other than these two. Of course, I didn't try other values.

The main point here is that if debugging is always unsuccessful, you should first look at the ERRATA DATASHEET, which will save a lot of time.

Reference address：Application of external interrupt 0 of LPC2214 chip

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