Change In Ipl At Acceptance Of Interrupt Request - Renesas 7700 FAMILY User Manual

INTERRUPTS
4.7 Sequence from acceptance of interrupt request to execution of interrupt routine

4.7.1 Change in IPL at acceptance of interrupt request

When an interrupt request is accepted, the processor interrupt priority level (IPL) is replaced with the
interrupt priority level of the accepted interrupt. This results in easy control of multiple interrupts. (Refer
to section "4.9 Multiple interrupts.")
When at reset or the watchdog timer or the software interrupt is accepted, the value shown in Table 4.7.1
is set in the IPL.
Table 4.7.1 Change in IPL at interrupt request acceptance
Interrupt source
Reset
Watchdog timer
Zero division
BRK instruction
Other interrupts
4–16
Level 0 ("000 ") is set.
2
Level 7 ("111 ") is set.
2
No change
No change
Interrupt priority level of the accepted interrupt request is set.
7751 Group User's Manual
Change in IPL