MAC7200 datasheet(100/976 Pages) FREESCALE

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Debug Mode

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

In addition to the above mode, each peripheral may be individually disabled in order to minimize power

consumption for those peripherals not used in a particular application.

Please consult the relevant chapter for information on the module behavior in Doze Mode. An important

source of information about the clocks in the system is Chapter 23, “Clock and Reset Generator (CRG)”.

See Chapter 3, “Low Power Modes” for more detailed information on low power modes.

2.8.1

Doze

In Doze mode the device can be configured to selectively halt the operation of individual peripherals. In

this mode it is possible to maintain operation of the DMA. For further power consumption savings, the

Real Time Interrupt and Watchdog can be disabled. This mode is entered by writing to the DOZE register

in the CRG. Wake up from this mode can be via a reset, an RTI (if enabled), an SWT event (if enabled), a

Self clock mode interrupt, a peripheral interrupt, an external interrupt, or the core clearing the DOZE

2.8.2

Run

Although this is not a low power mode, it is possible to enable power savings when operating in Run mode

by disabling specific peripherals which are not required in the application. This is done with the MDIS

2.9

Debug Mode

In addition to the functional chip modes and low power modes described above, the MAC72xx supports a

Debug mode. By placing the system in Debug mode, the following actions occur:

•

The ARM7 core is placed into Halt Mode or Monitor Mode, depending on the state of the DCR[4]

bit.

•

The Real Time Interrupt (RTI) clock is shut off

•

The Software Watchdog Timer (SWT) clock is shut off

•

All peripheral level debug features are enabled

—DMA2

— FlexCAN2

— DSPI

—eMIOS

—ATD

— MCM (Software Watchdog Timer)

More information on system debug features can be found in Chapter 8, “Debug”.

MAC7200 Datasheet(PDF) 100 Page - Freescale Semiconductor, Inc