Renesas SH7781 - Manual (Page 370)

10. Interrupt Controller (INTC)
Rev.1.00 Jan. 10, 2008 Page 340 of 1658
REJ09B0261-0100
10.6 Interrupt Response Time
Table 10.14 shows response time. The response time is the interval from generation of an interrupt
request until the start of interrupt exception handling and until fetching of the first instruction of
the exception handling routine.
Table 10.14 Interrupt Response Time
Number of States
Peripheral Modules
Item NMI IRL IRQ
Other than
GPIO/PCIC GPIO/PCIC Remarks
Priority
determination time 6Bcyc +
2Pcyc 8Bcyc +
2Pcyc 4Bcyc +
2Pcyc 5Pcyc 7Pcyc
Wait time until the
CPU finishes the
current sequence S-1 (
≥ 0)
× Icyc
Interval from the
start of interrupt
exception handling
(saving SR and PC)
until a SuperHyway
bus request is issued
to fetch the first
instruction of the
exception handling
routine 11Icyc
+ 1Scyc
Response
time Total (S + 10) Icyc
+ 1Scyc
+ 5Bcyc
+ 2Pcyc (S + 10) Icyc
+ 1Scyc
+ 8Bcyc
+ 2Pcyc (S + 10) Icyc
+ 1Scyc
+ 4Bcyc
+ 2Pcyc (S + 10) Icyc
+ 1Scyc
+ 5Pcyc (S + 10) Icyc
+ 1Scyc
+ 7Pcyc
Legend:
Icyc: Period of one CPU clock cycle
Scyc: Period of one SuperHyway clock cycle
Bcyc: Period of one bus clock cycle
Pcyc: Period of one peripheral clock cycle
S: Number of instruction execution states