Section 6 Interrupt Controller (INTC)
Rev. 3.00 Sep. 27, 2007 Page 96 of 758
REJ09B0243-0300
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:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
1
1
1
*
*
*
*
0
0
0
0
0
0
0
0
R
R
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
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
R
Reserved
These bits are always read as 1.
11 IRQ3L
*
R
Indicates the state of pin IRQ3.
0: State of pin IRQ3 is low
1: State of pin IRQ3 is high
10 IRQ2L
*
R
Indicates the state of pin IRQ2.
0: State of pin IRQ2 is low
1: State of pin IRQ2 is high
9 IRQ1L
*
R
Indicates the state of pin IRQ1.
0: State of pin IRQ1 is low
1: State of pin IRQ1 is high
8 IRQ0L
*
R
Indicates the state of pin IRQ0.
0: State of pin IRQ0 is low
1: State of pin IRQ0 is high
7to 4
All
0
Reserved
These bits are always read as 0. The write value
should always be 0.
Содержание SH7124 R5F7124
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