H8SLASH3021 datasheet(108/712 Pages) RENESAS

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5. Interrupt Controller

Rev.2.00 Mar. 22, 2007 Page 84 of 684

REJ09B0352-0200

5.2.2

Interrupt Priority Registers A and B (IPRA, IPRB)

IPRA and IPRB are 8-bit readable/writable registers that control interrupt priority.

Interrupt Priority Register A (IPRA): IPRA is an 8-bit readable/writable register in which

interrupt priority levels can be set.

Bit

Initial value

Read/Write

IPRA7

R/W

IPRA6

R/W

—

R/W

IPRA4

R/W

IPRA3

R/W

IPRA0

R/W

IPRA2

R/W

IPRA1

R/W

Priority level A7

Selects the priority level of IRQ interrupt requests

Priority level A2

Selects the priority level of

ITU channel 0 interrupt requests

Priority level A3

Selects the priority level of

WDT interrupt requests

Priority level A1

Selects the priority level

of ITU channel 1

interrupt requests

Priority

level A0

Selects the

priority level

of ITU

channel 2

interrupt

requests

Selects the priority level of IRQ1 interrupt requests

Priority level A6

Reserved bit

Selects the priority level of IRQ4 and IRQ5

interrupt requests

Priority level A4

IPRA is initialized to H'00 by a reset and in hardware standby mode.

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