pit programming

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pit programming

Postby serat » Sun Apr 20, 2008 9:57 pm

Hi,

In the tutorial, you say:

"Counter 0's OUT line indirectly connects to the PIC's IR0 line. Knowing that, when the IR0 line is low, the PIC will call the IRQ 0 handler defined by us. "

What is "Connecting Indirectly"?
Why will the PIC call the IRQ 0 handler defined by us,when the IR0 line is low?(It should be high)

Can you explain these in detail?

Thanks.
serat
 
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