6.1.4.8 Peripheral Bit-Banding

All of the peripherals, including the system registers, are located in the peripheral bit-banded space of the Cortex-M3 processor memory map. Therefore, bit manipulations may be performed on registers using bit-banded instructions from the Cortex-M3 processor instruction set. These guarantee atomic read-modify-write accesses, which are of use if multiple masters may be accessing a particular location.