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Renesas Technology, Tools FAQs
Last Updated: July 21, 2000
Document Number: 01051274_e
Q.
When I define an interrupt function with "#pragma INTERRUPT/B", the compiler does not generate any "fclrB" instruction for
register switching. Why is that?
A.
The CPU automatically stores the flag register contents in the stack when an interrupt occurs during program execution and retrieves
the contents from the stack when the CPU exits from the interrupt routine. Therefore, the compiler does not need to use the "fclrB"
instruction.
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