RM0090 Memory and bus architecture
Doc ID 018909 Rev 4 58/1422
0x0400 0000 - 0x07FF FFFF Reserved Reserved Reserved
FSMC bank 1
NOR/PSRAM 2
(Aliased)
0x0000 0000 - 0x03FF
FFFF
(2)(3)
Flash (1 MB) Aliased
SRAM1 (112 KB)
Aliased
System memory
(30 KB) Aliased
FSMC bank 1
NOR/PSRAM 1
(Aliased)
1. SRAM3 is available only on STM32F42xxx and STM32F43xxx
2. When the FSMC is remapped at address 0x0000 0000, only the first two regions of bank 1 memory controller (bank 1
NOR/PSRAM 1 and NOR/PSRAM 2) can be remapped. In remap mode, the CPU can access the external memory via ICode
bus instead of System bus which boosts up the performance.
3. Even when aliased in the boot memory space, the related memory is still accessible at its original memory space.
Table 4. Memory mapping vs. Boot mode/physical remap (continued)
Addresses
Boot/Remap in
main Flash memory
Boot/Remap in
embedded SRAM
Boot/Remap in
System memory
Remap in FSMC
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