HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 177

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

6.5.2
When multiple interrupts are used, the structure of the interrupt service routine should be as
follows.
1. Branch to a specific interrupt handler corresponding to a code set in INTEVT and INTEVT2.
2. Clear the cause of the interrupt in each specific handler.
3. Save SSR and SPC to the memory.
4. Clear the BL bit in SR, and set the accepted interrupt level in the interrupt mask bits in SR.
5. Handle the interrupt.
6. Execute the RTE instruction.
When these procedures are followed in order, an interrupt of higher priority than the one being
handled can be accepted after clearing BL in step 4.
The code in INTEVT and INTEVT2 can be used as a branch-offset for branching to the
specific handler.
Multiple Interrupts
Rev. 4.00, 03/04, page 131 of 660