Samsung S3C8275X - Manual (Page 88)

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