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AN2021 数据表(PDF) 11 Page - STMicroelectronics |
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AN2021 数据表(HTML) 11 Page - STMicroelectronics |
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11 / 39 page  AN2021 Modified features 11/39 1.3.1 Hardware impact None. 1.3.2 Software impact As the first 32 Kbytes of Flash memory are now divided into four sectors of 8 Kbytes each in the ST10F272 whereas the ST10F269 had only three sectors, the mapping of the application is impacted. Moreover, the Flash memory Write/Erase controller is different and therefore the programming routines must be updated. When the bit ROMEN of the SYSCON register is set, that is, when the internal Flash memory is enabled, accesses to the address range 05’0000h - 07’FFFFh are not redirected to external memory. The linker-locator configuration of the toolchain should be checked in order to prevent any use of this memory range. Table 3. Flash memory mapping Segment ST10F269 Flash mapping ST10F272 Flash mapping 8 08’0000-08’FFFF External memory 08’0000-08’FFFF Flash registers 7..5 05’0000-07’FFFF External memory 05’0000-07’FFFF Reserved 4 04’0000-04’FFFF Block6: 64 Kbytes 04’0000-04’FFFF Block7: 64 Kbytes 3 03’0000-03’FFFF Block5: 64 Kbytes 03’0000-03’FFFF Block6: 64 Kbytes 2 02’0000-02’FFFF Block4: 64 Kbytes 02’0000-02’FFFF Block5: 64 Kbytes 1 01’8000-01’FFFF Block3: 32 Kbytes 01’8000-01’FFFF Block4: 32 Kbytes 01’0000-01’7FFF External memory or remap of Blocks 0-2 01’0000-01’7FFF External memory or remap of Blocks 0-3 0 00’8000 - 00’FFFF External memory Internal RAM and Registers 00’8000 - 00’FFFF External memory Internal RAM and Registers 00’6000 - 00’7FFF Block 2: 8 Kbytes 00’6000 - 00’7FFF Block3: 8 Kbytes 00’4000 - 00’5FFF Block 1: 8 Kbytes 00’4000 - 00’5FFF Block2: 8 Kbytes 00’0000 - 00’3FFF Block 0: 16 Kbytes 00’2000 - 00’3FFF Block1: 8 Kbytes 00’0000 - 00’1FFF Block0: 8 Kbytes |
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