Applied Data Systems Bitsy Plus User Manual page 44

Bitsy Plus User's Manual
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In addition, the Bitsy Plus also controls its core power supplies to support sleep operation:
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The following diagram illustrates the architecture of the Bitsy Plus power management system. At
the heart of the system is a power controller that controls the state of the various power
subsystems of the Bitsy Plus. Under control of the StrongARM processor, this controller can
manage most of the power distribution of the board. The StrongARM PowerEnable signal
controls the rest of the subsystems.
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The controller inverts the PowerEnable signal for use with some subsystems. This details is not
shown in the diagram.
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External device 1 (/PE1, J3.42)
External device 2 (PE2, J3.24)
Vcc (5 V) supply
Vddx (3.3 V) Vddi (processor core) supplies
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ADS document # 110114-1001A