Datasheet
SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
62
10.5 Memory model
This section describes the processor memory map, the behavior of memory accesses, and the bit-banding
features. The processor has a fixed memory map that provides up to 4GB of addressable memory. The memory
map is:
The regions for SRAM and peripherals include bit-band regions. Bit-banding provides atomic operations to bit
data, see “Bit-banding” on page 66.
The processor reserves regions of the Private peripheral bus (PPB) address range for core peripheral registers,
see “About the Cortex-M3 peripherals” on page 152.
This memory mapping is generic to ARM Cortex-M3 products. To get the specific memory mapping of this product,
refer to the Memories section of the datasheet.
10.5.1 Memory regions, types and attributes
The memory map and the programming of the MPU split the memory map into regions. Each region has a defined
memory type, and some regions have additional memory attributes. The memory type and attributes determine the
behavior of accesses to the region.
The memory types are:
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