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Diff. between RET & RETI

peter john


What is difference between RETI and

RET?

regards,
peter.

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    The difference is slight, both take the return address from the stack. What is different is that RETI releases the interrupts of the same level of priority than the interrupt that has caused the branch, and RET doesn't. Sometimes it can be useful to use RET instead of RETI - I did it several times and I also saw it in PHILIPS' Application Notes.
    Regards,
    Michael.

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  • 0

    The difference is slight, both take the return address from the stack. What is different is that RETI releases the interrupts of the same level of priority than the interrupt that has caused the branch, and RET doesn't. Sometimes it can be useful to use RET instead of RETI - I did it several times and I also saw it in PHILIPS' Application Notes.
    Regards,
    Michael.

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