MAC7200 datasheet(186/976 Pages) FREESCALE

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Normal Expanded Mode

MAC7200 Microcontroller Family Reference Manual, Rev. 2

108

Freescale Semiconductor

9.4

Normal Expanded Mode

Normal Expanded Mode is typically used to debug and develop application code from an external memory.

Booting is done from the external bus, and all functionality is available. The advantage of debugging code

from an external memory (versus the internal Flash Main Array), is that software breakpoints may be

inserted without the added burden of re-programming the Flash Main Array. In this mode, the following

functionality is available:

•

Debug functionality (EICE, Nexus and the JTAG interface) is enabled

•

External Bus Interface is enabled

•

Flash main array access is enabled

•

Shadow Block access is enabled

•

Boot from the External Bus

Table 9-5 shows the device memory map of the device in Normal Expanded Mode after Reset. The

memory map for this mode differs from the memory map in Normal Single Chip Mode as follows:

•

The External Bus Interface is relocated to address $0000 0000

•

The Flash Main Array is relocated to address $2000 0000

Table 9-4. Allowed Memory Maps in Normal Primary Bootloader Mode

$0000 0000

$2000 0000

$4000 0000

AAMR Register

Unused

Flash Main Array

SRAM

$f0d0 0b80

SRAM

Flash Main Array

SRAM

$f0d0 0b8b

Flash Main Array

Unused

SRAM

$f0d0 0b08

Unused

SRAM

$f0d0 0b00

SRAM

Unused

SRAM

$f0d0 0b0b

Flash Main Array

SRAM

$f0d0 0bb8

Unused

SRAM

$f0d0 0bb0

SRAM

$f0d0 0bbb

Table 9-5. Device Memory Map in Normal Expanded Mode (After Reset)1

1. This reset memory map equates to a reset value of $f0d0 0b89 in the AAMR register in the MCM module.

Address

Module

Size

(Bytes)

$0000 0000 - $1FFF FFFF

External Bus Interface

512M

$2000 0000 - $2007 FFFF

$2000 0000 - $2004 FFFF

Flash Main Array (MAC72x1)

Flash Main Array (MAC72x2)

512K

320K

$20F0 0000 - $20F0 7FFF

Shadow Block

32K

$2008 0000 - $3FFF FFFF

Reserved

~511M

$4000 0000 - $4000 7FFF

$4000 0000 - $4000 4FFF

SRAM2

32K

20K

$4000 8000 - $FBFF FFFF

Reserved

3008M

$FC00 0000 - $FFFF FFFF

Peripheral Bus modules

64M

MAC7200 Datasheet(PDF) 186 Page - Freescale Semiconductor, Inc

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