Datasheet
different levels of power savings while in Sleep or Deep-Sleep modes. In addition, software has the
ability to control the LDO settings to gain a power advantage when running at slower speeds. Note
that these features may not be available on all devices; the System Properties (SYSPROP) register
provides information on whether a mode is supported on a given MCU. The following registers
provide these capabilities:
■ Peripheral Power Control (PCx): Controls power to peripheral if that peripheral has the ability
to respond to a power request.
■ Peripheral Memory Power Control (xMPC): Provides power control to some the peripheral
memory arrays.
■ LDO Sleep Power Control (LDOSPCTL): Controls the LDO value in Sleep mode
■ LDO Deep-Sleep Power Control (LDODPCTL): Controls the LDO value in Deep-Sleep mode
■ LDO Sleep Power Calibration (LDOSPCAL): Provides factory recommendations for the LDO
value in Sleep mode
■ LDO Deep-Sleep Power Calibration (LDODPCAL): Provides factory recommendations for the
LDO value in Deep-Sleep mode
■ Sleep Power Configuration (SLPPWRCFG): Controls the power saving modes for Flash memory
and SRAM in Sleep mode
■ Deep-Sleep Power Configuration (DSLPPWRCFG): Controls the power saving modes for
Flash memory and SRAM in Deep-Sleep mode
■ Deep-Sleep Clock Configuration (DSCLKCFG): Controls the clocking in Deep-Sleep mode
■ Sleep / Deep-Sleep Power Mode Status (SDPMST): Provides status information on the various
power saving events
Peripheral Power Control
The Peripheral Power Control (PCx) registers reside at offset 0x900 in the System Control module
register space. For modules that reside in a separate power domain, the user has the capability to
power down the module by setting the appropriate Pn bit to 0x0. This configuration provides the
lowest power consumption state of the module. Currently the following registers can be programmed
to disable power to the module:
■ PCCAN register
■ PCLCD register
■ PCEMAC register
■ PCEPHY register
■ PCUSB register
■ PCCCM register
Modification to other PCx registers have no effect, since they are not on their own power domain.
253December 13, 2013
Texas Instruments-Advance Information
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TM4C129XNCZAD Microcontroller