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MAC7200 Datasheet(PDF) 197 Page - Freescale Semiconductor, Inc |
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MAC7200 Datasheet(HTML) 197 Page - Freescale Semiconductor, Inc |
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197 / 976 page  Memory Map Relocation MAC7200 Microcontroller Family Reference Manual, Rev. 2 Freescale Semiconductor 119 9.16 Memory Map Relocation The MAC72xx is designed to have relocatable memory map resources, for the following reasons: • The ARM7 exception table is not relocatable. Therefore, in order to execute exception handlers from different memories, relocation of these memories is necessary. • Security of the Flash may dictate that certain combinations of resources should not be valid on a secured device. • Support for a software bootloader concept • General system flexibility As previously discussed, relocation of resources is generally available via the crossbar switch on a 512MB boundary. In addition, certain resources (SRAM and Shadow Block) may also be mirrored to give an extra granularity of relocation. The following sections discuss the details of this relocation. 9.16.1 System Memory Map Combinations Possible combinations that can be configured via software after reset are listed in Table 9-19. Shaded lines are those combinations that are not allowed in the MCM. $0000 0018 IRQ exception $0000 001c FIRQ exception Table 9-19. Possible Memory Map Configurations1 $0000 0000 $2000 0000 $4000 0000 $A000 0000 $E000 0000 Unused Unused SRAM BAM Peripheral Bus Unused FLASH SRAM BAM Peripheral Bus Unused FlexBus SRAM BAM Peripheral Bus Unused SRAM SRAM BAM Peripheral Bus FLASH Unused SRAM BAM Peripheral Bus FLASH FLASH SRAM BAM Peripheral Bus FLASH FlexBus SRAM BAM Peripheral Bus FLASH SRAM SRAM BAM Peripheral Bus FlexBus Unused SRAM BAM Peripheral Bus FlexBus FLASH SRAM BAM Peripheral Bus FlexBus FlexBus SRAM BAM Peripheral Bus FlexBus SRAM SRAM BAM Peripheral Bus Table 9-18. Exception Table Memory Map (Continued) Address Offset Function |
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