Device with power control feature involving backup power reservoir circuit

摘要

Power-backup capabilities are provided by implementing a variety of different methods, systems and devices. According to one such implementation, an energy storage device such as a capacitive storage circuit is powered relative to the powering of one or more additional circuits from a common power supply to limit the draw upon the power supply. Certain applications involve delaying or otherwise modifying the powering of the capacitive storage circuit, which may involve an initial startup of the capacitive storage circuit.

主权项

1. An apparatus comprising:
a primary memory circuit configured to maintain data integrity in an absence of operating power; a data-access circuit including a second memory circuit configured with data that is mapped to data in the primary memory circuit and including a memory control circuit, the memory control circuit configured to provide access to a subset of data in the second memory circuit that is mapped to data in the primary memory circuit and to control backup operations of the second memory circuit in response to a power interruption; a backup power-reservoir circuit that includes a power-store device configured and arranged to receive a charge from a power supply, and that is configured to hold a charge to supply backup power for powering backup functions of the second memory circuit; and a power control circuit configured to:
receive, from the backup power-reservoir circuit, an identification signal that includes an indication that at least one of the primary memory circuit and the second memory circuit is of a certain type;select, in response to the indication that at least one of the primary memory circuit and the second memory circuit is of a certain type, a power startup algorithm for the backup power-reservoir circuit and the at least one of the primary memory circuit and the second memory circuit; andexecute the power startup algorithm to slow the charging of the backup power-reservoir circuit relative to powering of another circuit.