SH7101 datasheet(118/560 Pages) RENESAS

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Section 6 Interrupt Controller (INTC)

Rev.1.00 Sep. 18, 2008 Page 84 of 522

REJ09B0069-0100

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.

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, D to K (IPRA, IPRD to IPRK).

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

Name

Vector

No.

Vector Table

Starting Address

IPR

Default

Priority

External pin

NMI

H'0000002C

⎯

High

⎯

Reserved by system

H'00000038

⎯

Reserved by system

H'0000003C

⎯

IRQ0

H'00000100

IPRA15 to

IPRA12

IRQ1

H'00000104

IPRA11 to IPRA8

IRQ2

H'00000108

IPRA7 to IPRA4

IRQ3

H'0000010C

IPRA3 to IPRA0

Reserved by system

H'00000110

⎯

Reserved by system

H'00000114

⎯

Reserved by system

H'00000118

⎯

Interrupts

Reserved by system

H'0000011C

⎯

Reserved by system

H'00000120

⎯

Reserved by system

H'00000130

⎯

Reserved by system

H'00000140

⎯

Reserved by system

H'00000150

⎯

Low

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