3.2.1. Remap

The remapping feature of the bus matrix provides the following remapping options:

REMAP[0]

The Embedded flash memory region represents the maximum supported eFlash size: 512KB. If the size of the actual eFlash banks is 256kB, the upper 256kB can be remapped to the AHB expansion port as follows:

  • 0: 512KB eFlash

  • 1: 256KB eFlash upper 256kbytes mapped to AHB expansion port

REMAP[1]

If SRAM1 is not present the corresponding memory range can be mapped to AHB expansion port as follows:

  • 0: SRAM1 present

  • 1: SRAM1 not available, mapped to AHB expansion port

REMAP[2]

If SRAM2 is not present the corresponding memory range can be mapped to AHB expansion port as follows:

  • 0: SRAM2 present

  • 1: SRAM2 not available, mapped to AHB expansion port

REMAP[3]

If SRAM3 is not present the corresponding memory range can be mapped to AHB expansion port as follows:

  • 0: SRAM3 present

  • 1: SRAM3 not available, mapped to AHB expansion port

The PPB address region of the Cortex-M3 memory map is assigned to the default slave of the MTX thus returns SLVERR response.

Table 3.1. Code and SRAM regions

RegionStartEndPeripheralSizeAHB bus matrixRemapComment
 AddressAddressname port3210 
Code0x00x0003FFFF

eFlash 2x128K

256KTARG_FLASH0----Actual size is implementation defined
0x000400000x0007FFFFeFlash 2x256K256KTARG_FLASH0---0Implementation defined
AHB Expansion2x128KTARG_EXP1---1-
0x000800000x01FFFFFFAHB Expansion511MTARG_EXP1-----
SRAM0x200000000x20007FFFSRAM032KTARG_SRAM0----Bit band region
0x200080000x2000FFFFSRAM132KTARG_SRAM1--0-Bit band region
AHB Expansion32KTARG_EXP1--1-Bit band region
0x200100000x20017FFFSRAM232KTARG_SRAM2-0--Bit band region
AHB Expansion32KTARG_EXP1-1--Bit band region
0x200180000x2001FFFFSRAM32KTARG_SRAM30-- Bit band region
AHB Expansion32KTARG_EXP11-- Bit band region
0x200200000x3FFFFFFFAHB Expansion511MTARG_EXP1----

Bit band region 0x20020000 to 0x200FFFFF

Bit band alias 0x22000000 to 0x23FFFFFF


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