HD6417618 datasheet(130/646 Pages) RENESAS

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Section 6 Interrupt Controller (INTC)

Rev. 6.00 Jun. 12, 2007 Page 98 of 610

REJ09B0131-0600

6.5

Interrupt Exception Handling Vector Table

Table 6.2 lists interrupt sources, their vector numbers, vector table address offsets, and interrupt

priorities.

Individual interrupt sources are allocated to different vector numbers and vector table address

offsets. Vector table addresses are calculated from the vector numbers and vector table address

offsets. For interrupt exception handling, the start address of the exception handling routine is

fetched from the vector table address in the vector table. For the details on calculation of vector

table addresses, see table 5.4, Calculating Exception Handling Vector Table Addresses in

section 5, Exception Handling.

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 E (IPRA to IPRE).

However, when interrupt sources whose priority levels are allocated with the same IPR are

requested, the interrupt of the smaller vector number has priority. This priority cannot be changed.

Priority levels of IRQ interrupts and on-chip peripheral module interrupts are initialized to level 0

at a power-on reset. If the same priority level is allocated to two or more interrupt sources and

interrupts from those sources occur simultaneously, they are processed by the default priority

order shown in table 6.2.

Table 6.2

Interrupt Exception Handling Vectors and Priorities

Interrupt

Source

Name

Vector

No.

Vector Table

Starting Address

IPR

Default

Priority

User break

H'00000030



High

External pin

NMI

H'0000002C



H-UDI

H'00000034



External pin

IRQ0

H'00000100

IPRA15 to IPRA12

IRQ1

H'00000104

IPRA11 to IPRA8

IRQ2

H'00000108

IPRA7 to IPRA4

IRQ3

H'0000010C

IPRA3 to IPRA0

IRQ4

H'00000140

IPRB15 to IPRB12

IRQ5

H'00000144

IPRB11 to IPRB8

IRQ6

H'00000148

IPRB7 to IPRB4

IRQ7

H'0000014C

IPRB3 to IPRB0

WDT

ITI

H'00000150

IPRC15 to IPRC12 Low

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