Preliminary
S3C2451X RISC MICROPROCESSOR
INTERRUPT CONTROLLER
10-25
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
PRIORITY MODE REGISTER (PRIORITY_MODE)
Register Address
R/W
Description
Reset
Value
PRIORITY_MODE
1
0x4A000030
R/W
IRQ priority mode register
0x00000000
PRIORITY_MODE
2
0x4A000070
R/W
IRQ priority mode register
0x00000000
PRIORITY_MODE1 Bit
Description
Initial
State
ARB_MODE6
[27]
Arbiter 6 group priority mode selection
0 = Fixed ends & Rotate middle 1 = Rotate all
0
ARB_SEL6
[26:24] Arbiter 6 group priority order set
1) ARB_MODE6 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE6 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
101 = REQ 5-0-1-2-3-4
0
ARB_MODE5
[23]
Arbiter 5 group priority mode selection
0 = Fixed ends & Rotate middle
0
ARB_SEL5
[22:20] Arbiter 5 group priority order set
1) ARB_MODE5 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
0
ARB_MODE4
[19]
Arbiter 4 group priority mode selection
0 = Fixed ends & Rotate middle 1 = Rotate all
0
ARB_SEL4
[18:16] Arbiter 4 group priority order set
1) ARB_MODE4 = 1’b0
00 = REQ 0-1-2-3-4-5
01 = REQ 0-2-3-4-1-5
10 = REQ 0-3-4-1-2-5
11 = REQ 0-4-1-2-3-5
2) ARB_MODE4 = 1’b1
000 = REQ 0-1-2-3-4-5
001 = REQ 1-2-3-4-5-0
010 = REQ 2-3-4-5-0-1
011 = REQ 3-4-5-0-1-2
100 = REQ 4-5-0-1-2-3
101 = REQ 5-0-1-2-3-4
0
ARB_MODE3
[15]
Arbiter 3 group priority mode selection
0 = Fixed ends & Rotate middle 1 = Rotate all
0