Samsung C8278X ユーザーズマニュアル
CONTROL REGISTERS
S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
4-18
IPR
— Interrupt Priority Register
FFH
Set 1, Bank 0
Bit
Identifier
.7 .6 .5 .4 .3 .2 .1 .0
Reset Value
x x x x x x x x
Read/Write
R/W R/W R/W R/W R/W R/W R/W R/W
Addressing Mode
Register addressing mode only
.7, .4, and .1
Priority Control Bits for Interrupt Groups A, B, and C
(note)
0 0 0
Group
priority
undefined
0
0
1
B > C > A
0
1
0
A > B > C
0
1
1
B > A > C
1
0
0
C > A > B
1
0
1
C > B > A
1
1
0
A > C > B
1 1 1
Group
priority
undefined
.6
Interrupt Subgroup C Priority Control Bit
0
IRQ6 > IRQ7
1
IRQ7 > IRQ6
.5
Interrupt Group C Priority Control Bit
0
IRQ5 > (IRQ6, IRQ7)
1
(IRQ6, IRQ7) > IRQ5
.3
Interrupt Subgroup B Priority Control Bit
0
IRQ3 > IRQ4
1
IRQ4 > IRQ3
.2
Interrupt Group B Priority Control Bit
0
IRQ2 > (IRQ3, IRQ4)
1
(IRQ3, IRQ4) > IRQ2
.0
Interrupt Group A Priority Control Bit
0
IRQ0 > IRQ1
1
IRQ1 > IRQ0
NOTE: Interrupt Group A – IRQ0, IRQ1
Interrupt Group B – IRQ2, IRQ3, IRQ4
Interrupt Group C – IRQ5, IRQ6, IRQ7