SH7144 Datasheet, PDF (119/773 Pages) Renesas Technology Corp – Hitachi SuperH RISC engine

6.5 Interrupt Exception Processing Vectors Table
Table 6.2 lists interrupt sources and their vector numbers, vector table address offsets and interrupt
priorities.
Each interrupt source is allocated a different vector number and vector table address offset. Vector
table addresses are calculated from the vector numbers and address offsets. In interrupt exception
processing, the exception service routine start address is fetched from the vector table indicated by
the vector table address. For the details of calculation of vector table address, see table 5.4,
Calculating Exception Processing Vector Table Addresses in the section 5, Exception Processing.
IRQ interrupts and on-chip peripheral module interrupt priorities can be set freely between 0 and
15 for each pin or module by setting interrupt priority registers A to J (IPRA to IPRJ). However,
the smaller vector number has interrupt source, the higher priority ranking is assigned among two
or more interrupt sources specified by the same IPR, and the priority ranking cannot be changed.
A power-on reset assigns priority level 0 to IRQ interrupts and on-chip peripheral module
interrupts. If the same priority level is assigned to two or more interrupt sources and interrupts
from those sources occur simultaneously, they are processed by the default priority order indicated
in table 6.2.
Table 6.2 Interrupt Exception Processing Vectors and Priorities
Interrupt
Source
External pin
User break
H-UDI
—
Interrupts
DMAC
Name
Vector
No.
NMI
11
12
14
Reserved by system 15
IRQ0
64
IRQ1
65
IRQ2
66
IRQ3
67
IRQ4
68
IRQ5
69
IRQ6
70
IRQ7
71
DEI0
72
DEI1
76
DEI2
80
DEI3
84
Vector Table
Starting Address IPR
Default
Priority
H'0000002C
—
High
H'00000030
—
H'00000038
—
H'0000003C
—
H'00000100
IPRA15 to IPRA12
H'00000104
IPRA11 to IPRA8
H'00000108
IPRA7 to IPRA4
H'0000010C
IPRA3 to IPRA0
H'00000110
IPRB15 to IPRB12
H'00000114
IPRB11 to IPRB8
H'00000118
IPRB7 to IPRB4
H'0000011C
IPRB3 to IPRB0
H'00000120
IPRC15 to IPRC12
H'00000130
IPRC11 to IPRC8
H'00000140
IPRC7 to IPRC4
H'00000150
IPRC3 to IPRC0 Low
Rev. 2.0, 09/02, page 79 of 732