发明名称 |
Integrated circuit for switching from power supply to battery, integrated latch lock, and associated method for same |
摘要 |
An integrated circuit and associated method for switching from a power supply to a battery are provided. The integrated circuit preferably includes a memory circuit responsive to an external power supply and to a battery for storing data therein and a sleep mode latching circuit connected to the memory circuit for latching the memory circuit in a reduced power sleep mode condition so as to reduce power usage of a battery and a non-sleep mode operating condition so as to allow normal operation of the memory circuit by a power supply. The integrated circuit preferably also includes a sleep mode latch locking circuit connected to the sleep mode latching circuit and the memory circuit and responsive to a power supply for locking the sleep mode latching circuit in the non-sleep mode operating condition when power supplied from the power supply falls below a predetermined threshold so that the memory circuit is inhibited from inadvertently entering the reduced power sleep mode condition.
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申请公布号 |
US6075742(A) |
申请公布日期 |
2000.06.13 |
申请号 |
US19970002484 |
申请日期 |
1997.12.31 |
申请人 |
STMICROELECTRONICS, INC. |
发明人 |
YOUSSEF, TOM;MCCLURE, DAVID CHARLES |
分类号 |
G11C5/14;(IPC1-7):G11C7/00 |
主分类号 |
G11C5/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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