NXP Semiconductors LPC1768 - System Control Block; The CMSIS Mapping of the Cortex-M3 SCB Registers; Auxiliary Control Register

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User manual Rev. 3 — 20 December 2013 768 of 841
NXP Semiconductors
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Chapter 34: Appendix: Cortex-M3 user guide
34.4.3 System control block
The System control block (SCB) provides system implementation information, and
system control. This includes configuration, control, and reporting of the system
exceptions. The system control block registers are:
[1] See the register description for more information.
[2] A subregister of the CFSR.
34.4.3.1 The CMSIS mapping of the Cortex-M3 SCB registers
To improve software efficiency, the CMSIS simplifies the SCB register presentation. In the
CMSIS, the byte array
SHP[0] to SHP[12] corresponds to the registers SHPR1-SHPR3.
34.4.3.2 Auxiliary Control Register
The ACTLR provides disable bits for the following processor functions:
• IT folding
• write buffer use for accesses to the default memory map
• interruption of multi-cycle instructions.
See the register summary in Table 654
for the ACTLR attributes. The bit assignments are
shown in Table 655
.
Table 654. Summary of the system control block registers
Address Name Type Required
privilege
Reset
value
Description
0xE000E008 ACTLR RW Privileged 0x00000000 Table 655
0xE000ED00 CPUID RO Privileged 0x412FC230 Table 656
0xE000ED04 ICSR RW
[1]
Privileged 0x00000000 Table 657
0xE000ED08 VTOR RW Privileged 0x00000000 Table 658
0xE000ED0C AIRCR RW
[1]
Privileged 0xFA050000 Table 659
0xE000ED10 SCR RW Privileged 0x00000000 Table 661
0xE000ED14 CCR RW Privileged 0x00000200 Table 662
0xE000ED18 SHPR1 RW Privileged 0x00000000 Table 664
0xE000ED1C SHPR2 RW Privileged 0x00000000 Table 665
0xE000ED20 SHPR3 RW Privileged 0x00000000 Table 666
0xE000ED24 SHCRS RW Privileged 0x00000000 Table 667
0xE000ED28 CFSR RW Privileged 0x00000000 Section 34.4.3.11
0xE000ED28 MMSR
[2]
RW Privileged 0x00 Table 668
0xE000ED29 BFSR
[2]
RW Privileged 0x00 Table 669
0xE000ED2A UFSR
[2]
RW Privileged 0x0000 Table 670
0xE000ED2C HFSR RW Privileged 0x00000000 Table 671
0xE000ED34 MMFAR RW Privileged Undefined Table 672
0xE000ED38 BFAR RW Privileged Undefined Table 673