Back to results
US 2003/0142574 A1Published application
Battery backed memory with battery disconnect for improved battery life
AssigneeRockwell Automation Technologies, Inc.
InventorsWilliam Edward Floro, Frank Joseph Priore
Life of this patent
Estimating the term…
Abstract
Battery backed memory for use in an industrial controller allows software disconnect of the battery and memory so that unplanned power outages may receive the benefit of battery backup, but battery power is not unduly wasted during planned power outages when data loss may be accommodated or other provisions may be made for saving data in nonvolatile memory.
Claims15
A battery backed memory system comprising:
- a first line receiving a source of on-line voltage;
- a second line receiving a source of battery voltage to provide backup voltage when line voltage is lost;
- an electronically controlled switch;
- volatile solid state memory receiving voltage from the first line and from the second line via the electronically controlled switch;
- and
- a microprocessor communicating with the volatile solid state memory and the electronically controlled switch and executing a program to open the electronically controlled switch in response to a signal indicating a planned cessation of line voltage.
3 more elements
A method of controlling a battery backed memory system including a first line receiving a source of on-line voltage;
- a second line receiving a source of battery voltage to provide backup voltage when line voltage is lost;
- an electronically controlled switch;
- volatile solid state memory receiving voltage from the first line and from the second line via the electronically controlled switch;
- and a microprocessor communicating with the volatile solid state memory and the electronically controlled switch, the method comprising the step of:
- executing a program by the microprocessor to open the electronically controlled switch in response to a signal indicating a planned cessation of line voltage.
2 more elements
Dependencies are inferred from the claim text.