Fujitsu F2MC-16LX Hardware Manual page 78

CHAPTER 3 INTERRUPT
5. The interrupt level mask register (ILM) and interrupt enable flag (I) are set to "interrupt
acceptable".
6. A hardware interrupt request is generated by generation of a peripheral function interrupt.
7. Interrupt processing hardware saves registers to branch to the interrupt processing program.
8. The interrupt processing program processes peripheral functions because of interrupt
generation.
9. The interrupt request from peripheral function is canceled.
10.The interrupt return instruction is executed, and the program is restored to what it was before
branching.
62