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Hi,
Generally speaking the INT0 interrupt is on PortB.0 and the Interrupt on change feature is on PortB.4-7. With that being said the dataheet for your particular PIC has specific info on each interrupt and how it is controlled. Some have more than one external interrupt (INT1 etc) some don't, some can enable/disable the IOC feature on individual pins (within the predefined group), some can't etc etc.
/Henrik.
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If we are talking about 16F628A, then you can use two 628A in your project with RB7-RB4 int source.
This way, you get 8 pins for interrupt.
Connect two pics to each other and control one another.
Nice?
"If the Earth were a single state, Istanbul would be its capital." Napoleon Bonaparte
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Use a stack of 10F200's, GP1/GP2/GP3 interrupt inputs, GP0 is a serial interrupt output, simulated 'open-drain' setup, feeding a master PIC on RxD. A bit like the stacked interrupt chain (8259? 8279? INT2?) on the old PC's...
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10F200's don't have interrupts.
<br>
DT
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Thanks everyone, I am using the 16F628A. I will go back to the datasheet and see if I can make out what it is talking about.
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I know...used the term interrupt in the wrong context...Originally Posted by Darrel Taylor
What I meant to get across was 'a very tight loop, polling the pins, waiting for an event on any of the input pins, and reacting to that input event with an output event on another pin.'
The 10F2xx may not have interrupts, but they do have Wake-From-Sleep, which might be just as good. (just noticed, the 10F doesn't have a RETFIE instruction either!)
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