ARM Compiler toolchain v4.1 for µVision Using the Compiler

Compiler Features
4.15 Compiler and processor support for bit-banding
Bit-banding is supported by the compiler in the following ways:
• __attribute((bitband)) language extension
• --bitband command-line option.
Bit-banding is a feature of the Cortex-M3 and Cortex-M4 processors (--cpu=Cortex-M3 and
--cpu=Cortex-M4) and some derivatives (for example, --cpu=Cortex-M3-rev0). This functionality
is not available on other ARM processors.
4.15.1 See also
Concepts
• Compiler type attribute, __attribute__((bitband)) on page 4-22
• --bitband compiler command-line option on page 4-24
• How the compiler handles bit-band objects placed outside bit-band regions on page 4-26.
Reference
Compiler Reference:
• __attribute__((bitband)) type attribute on page 5-36
• --bitband on page 3-15.
Other information
• Technical Reference Manual for your processor.
ARM DUI 0375C Copyright © 2007-2008, 2011 ARM. All rights reserved. 4-21
ID061811
Non-Confidential