LM3S8938 Datasheet, PDF (113/550 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S8938 Microcontroller
7 Hibernation Module
HIB
The Hibernation Module manages removal and restoration of power to the rest of the microcontroller
to provide a means for reducing power consumption. When the processor and peripherals are idle,
power can be completely removed with only the Hibernation Module remaining powered. Power
can be restored based on an external signal, or at a certain time using the built-in real-time clock
(RTC). The Hibernation module can be independently supplied from a battery or an auxillary power
supply.
The Hibernation module has the following features:
■ Power-switching logic to discrete external regulator
■ Dedicated pin for waking from an external signal
■ Low-battery detection, signalling, and interrupt generation
■ 32-bit real-time counter (RTC)
■ Two 32-bit RTC match registers for timed wake-up and interrupt generation
■ Clock source from a 32.768-kHz external oscillator or a 4.194304-MHz crystal
■ RTC trim predivider for making fine adjustments to the clock rate
■ 64 32-bit words of non-volatile memory
■ Programmable interrupts for RTC match, external wake, and low battery events
June 14, 2007
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