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yu-jun
Visitor II
September 13, 2004
Question

About the Enhanced Interrupt Controller

  • September 13, 2004
  • 2 replies
  • 790 views
Posted on September 14, 2004 at 01:54

About the Enhanced Interrupt Controller

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    2 replies

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    yu-junAuthor
    Visitor II
    September 10, 2004
    Posted on September 10, 2004 at 08:01

    In the AN1776.PDF, the user program run in the SYS mode. when the an interrupt occurs, system jump to IRQHandler.

    Why is the mode SYS mode and not USR mode?

    If the mode is USR mode, the routine is same.
    Y
    yu-junAuthor
    Visitor II
    September 13, 2004
    Posted on September 14, 2004 at 01:54

    Thanks, I see, but I have another question:

    why to change IRQ mode to SYS mode, why does program not deal with the interrupt task in IRQ mode?
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