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US 12,769,385 B2Granted
Power management circuit
AssigneeRohm Co., Ltd.
InventorKoichi Miyanaga
Life of this patent
Estimating the term…
Abstract
A sequencer includes a logic circuit capable of controlling a plurality of power supply circuits to be activated or shut down. An event signal Sig is input to each of the at least one control pin EVT. An operation of the sequencer can be set according to setting data CONFIG stored in a nonvolatile memory.
Claims14
A power management circuit comprising:
- a sequencer including a logic circuit structured to control start up and shutdown of a plurality of power supply circuits;
- a nonvolatile memory;
- and
- a plurality of control pins, each of the plurality of control pins being associated with a different event, and each of the plurality of control pins being configured to receive an event signal that is asserted when the corresponding event occurs and is negated when the corresponding event ends,
- wherein a setting data stored in the nonvolatile memory includes first data specifying one or more power supply circuits assigned to each of the plurality of control pins, and
- wherein the sequencer is structured to, when an event signal input to any of the plurality of control pins is asserted, activate the one or more power supply circuits assigned to a control pin of the plurality of control pins according to a first predetermined sequence, and when the event signal input to any of the plurality of control pins is negated, shut down the one or more power supply circuits assigned to a control pin of the plurality of control pins according to a second predetermined sequence.
3 more elements
Dependencies are inferred from the claim text.