SH7136 datasheet(126/1160 Pages) RENESAS

126 / 1160 page

Section 6 Interrupt Controller (INTC)

Rev. 2.00 Sep. 10, 2008 Page 100 of 1130

REJ09B0402-0200

6.3.3

IRQ Status register (IRQSR)

IRQSR is a 16-bit register that indicates the states of the external interrupt input pins IRQ0 to

IRQ3 and the status of interrupt request.

Bit:

Initial value:

R/W:

987654321

1111

0000

RRRR

****

0000

R/W

----

Note:

The initial value is 1 when the level on the corresponding IRQ pin is high, and 0 when the level on the pin is low.

IRQ3L

IRQ2L

IRQ1L

IRQ0L

IRQ3F IRQ2F IRQ1F IRQ0F

Bit

Bit Name

Initial

Value

R/W

Description

15 to 12



All 1

Reserved

These bits are always read as 1. The write value

should always be 1.

IRQ3L

Indicates the state of pin IRQ3.

0: State of pin IRQ3 is low

1: State of pin IRQ3 is high

IRQ2L

Indicates the state of pin IRQ2.

0: State of pin IRQ2 is low

1: State of pin IRQ2 is high

IRQ1L

Indicates the state of pin IRQ1.

0: State of pin IRQ1 is low

1: State of pin IRQ1 is high

IRQ0L

Indicates the state of pin IRQ0.

0: State of pin IRQ0 is low

1: State of pin IRQ0 is high

7 to 4



All 0

Reserved

These bits are always read as 0. The write value

should always be 0.

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