MAC7200 datasheet(198/976 Pages) FREESCALE

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Memory Map Relocation

MAC7200 Microcontroller Family Reference Manual, Rev. 2

120

Freescale Semiconductor

9.16.2

Changing Chip Modes

Since changing the security mode of the Flash requires a system reset afterwards, the chip modes can only

be switched by resetting the device, and re-applying the correct signals to the MODA/MODB pins.

9.16.3

Resource Relocation Summary

Also refer to Chapter 2, “Modes of Operation”.

9.16.3.1

FlexBus

The FlexBus is generally software relocatable (via the AAMR register in the MCM) to the following

addresses:

•

$0000 0000

•

$2000 0000

9.16.3.2

Flash Main Array

The Flash Main Array is generally software relocatable (via the AAMR register in the MCM) to the

following addresses:

•

$0000 0000

•

$2000 0000

9.16.3.3

Shadow Block

The relocation of the Shadow Block is done by relocating the Flash main array.

In Normal/Secured Bootloader Mode, where the Shadow Block is relocated to address $0000 0000, once

another resource (like the SRAM) has been relocated to address $0000 0000, the Shadow Block can not

be relocated back to address $0000 0000 without resetting the device. The exact mechanism for this is

described in Section 9.16.4, “Programming the AAMR register in the MCM”.

SRAM

Unused

SRAM

BAM

Peripheral Bus

SRAM

FLASH

SRAM

BAM

Peripheral Bus

SRAM

FlexBus

SRAM

BAM

Peripheral Bus

SRAM

BAM

Peripheral Bus

BAM

FLASH

SRAM

BAM

Peripheral Bus

1. The Shadow Block is not included in the above table, because it is generally not relocatable. In Normal/Secured

Bootloader Modes, the Shadow Block is located at address $0000 0000 at reset, but is not relocatable after reset. In

all other modes, if the Flash is available, then the Shadow Block is also available (at FLASH_BASE + $00F0 0000).

Table 9-19. Possible Memory Map Configurations1 (Continued)

$0000 0000

$2000 0000

$4000 0000

$A000 0000

$E000 0000

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