SH7018 Datasheet, PDF (90/431 Pages) Renesas Technology Corp – SuperH™ RISC engine

Interrupt acceptance
1
IRQ
Instruction (instruction
replaced by interrupt
exception processing)
5 + m1 + m2 + m3
3 ^{m1 m2 1 m3 1}
3
F DE E MMEME E
Overrun fetch
F
Interrupt service routine
start instruction
FDE
F: Instruction fetch (instruction fetched from memory where program is stored).
D: Instruction decoding (fetched instruction is decoded).
E: Instruction execution (data operation and address calculation is performed
according to the results of decoding).
M: Memory access (data in memory is accessed).
Figure 6.5 Pipeline when an IRQ Interrupt is Accepted
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