SH7046 Datasheet, PDF (127/611 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7046 Series

Section 6 Interrupt Controller (INTC)
8. When the accepted interrupt is sensed by level or is from an on-chip peripheral module, a high
level is output from the IRQOUT pin. When the accepted interrupt is sensed by edge, a high
level is output from the IRQOUT pin at the moment when the CPU starts interrupt exception
processing instead of instruction execution as noted in (5) above. However, if the interrupt
controller accepts an interrupt with a higher priority than the interrupt just to be accepting, the
IRQOUT pin holds low level.
9. The CPU reads the start address of the exception service routine from the exception vector
table for the accepted interrupt, jumps to that address, and starts executing the program. This
jump is not a delay branch.
Note: * Interrupt requests that are designated as edge-detect type are held pending until the
interrupt requests are accepted. IRQ interrupts, however, can be cancelled by accessing
the IRQ status register (ISR). Interrupts held pending due to edge detection are cleared
by a power-on reset or a manual reset.
Rev. 4.00 Dec 05, 2005 page 83 of 564
REJ09B0270-0400