System Control
ARM DDI 0363G Copyright © 2006-2011 ARM Limited. All rights reserved. 4-79
ID073015 Non-Confidential
Table 4-57 shows the Build Options 2 Register bit assignments.
Table 4-57 Build Options 2 Register bit assignments
Bits Name Function
[31]
DUAL_CORE
a
Indicates whether a second, redundant, copy of the processor logic and
checking logic was instantiated:
0
= single core
1
= dual core.
[30]
DUAL_NCLK
a
Indicates whether an inverted clock is used for the redundant core:
0
= inverted clock not used
1
= inverted clock used.
[29] NO_ICACHE Indicates whether the processor contains instruction cache:
0
= processor contains instruction cache
1
= processor does not contain instruction cache.
[28] NO_DCACHE Indicates whether the processor contains data cache:
0
= processor contains data cache
1
= processor does not contain data cache.
[27:26] ATCM_ES Indicates whether an error scheme is implemented on the ATCM interface:
00
= no error scheme
01
= 8-bit parity logic
10
= 32-bit error detection and correction
11
= 64-bit error detection and correction.
[25:24] BTCM_ES Indicates whether an error scheme is implemented on the BTCM
interface(s):
00
= no error scheme
01
= 8-bit parity logic
10
= 32-bit error detection and correction
11
= 64-bit error detection and correction.
[23] NO_IE Indicates whether the processor supports big-endian instructions:
0
= processor supports big-endian instructions
1
= processor does not support big-endian instructions.
[22] NO_FPU Indicates whether the processor contains a floating point unit:
0
= processor contains a floating point unit
1
= processor does not contain a floating point unit.
[21] NO_MPU Indicates whether the processor contains a Memory Protection Unit (MPU):
0
= processor contains an MPU
1
= processor does not contain an MPU.
[20] MPU_REGIONS Indicates the number of regions in the included MPU:
0
= 8
1
= 12.
If the processor does not contain an MPU (bit [21] set to 0), this bit is set to 0.
[19:17] BREAK_POINTS Indicates the number of break points implemented in the processor, minus 1.
[16:14] WATCH_POINTS Indicates the number of watch points implemented in the processor, minus 1.
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