PM0056 datasheet(24/156 Pages) STMICROELECTRONICS

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The Cortex-M3 processor

PM0056

24/156

DocID15491 Rev 5

2.2

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 4 GB of

addressable memory.

Figure 9. Memory map

The regions for SRAM and peripherals include bit-band regions. Bit-banding provides

atomic operations to bit data, see Section 2.2.5: Bit-banding on page 28.

The processor reserves regions of the Private peripheral bus (PPB) address range for core

peripheral registers, see Section 4.1: About the STM32 core peripherals on page 105.

Vendor-specific

memory

External device

External RAM

Peripheral

SRAM

Code

0xFFFFFFFF

Private peripheral

bus

0xE0100000

0xE00FFFFF

0x9FFFFFFF

0xA0000000

0x5FFFFFFF

0x60000000

0x3FFFFFFF

0x40000000

0x1FFFFFFF

0x20000000

0x00000000

0x40000000

Bit band region

Bit band alias

32MB

1MB

0x400FFFFF

0x42000000

0x43FFFFFF

Bit band region

Bit band alias

32MB

1MB

0x20000000

0x200FFFFF

0x22000000

0x23FFFFFF

1.0GB

0.5GB

0xDFFFFFFF

0xE0000000

1.0MB

511MB

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