MAC7200 datasheet(88/976 Pages) FREESCALE

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Modes of Operation

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

Note that resetting the device is mandatory in all three cases.

1.3.1

Single Chip mode (Unsecured)

•

EICE/Nexus/JTAG active

— Enable TCK, TDI, TDO and DBGEN

•

FlexBus available at $2000 0000

•

Boot from Flash main array at $0000 0000

— Shadow Block available at $00f0 0000

•

JTAG Lockout Recovery is available

1.3.2

Single Chip mode (Secured)

•

No EICE/Nexus/JTAG

— Disable DBGEN and Nexus clock(s)

•

No FlexBus

•

Boot from Flash main array at $0000 0000

— Shadow Block available at $00f0 0000

•

JTAG Lockout Recovery is available

1.3.3

PBL Chip mode (Secured)

•

Same as Single Chip mode, except boot from the Shadow Block

•

No EICE/Nexus/JTAG

— Disable DBGEN and Nexus clock(s)

•

No FlexBus

•

Relocate Shadow Block to $0000 0000

Table 1-3. Chip Mode Encodings

MODA

(PD1)

MODB

(PD0)

Flash

Secured ?

Chip Mode

Yes

Single Chip Secured Mode

Yes

Expanded Chip Secured Mode

Yes

PBL Secured Mode

Yes

Reserved

Single Chip Unsecured Mode

Expanded Chip Unsecured Mode

PBL Unsecured Mode

Reserved

MAC7200 Datasheet(PDF) 88 Page - Freescale Semiconductor, Inc

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