发明名称 |
Memory protection system |
摘要 |
A memory protection system includes an auxiliary power supply source for maintaining information stored in a random access memory when the main power supply is terminated. When the main power supply voltage level becomes lower than a preselected level, a detection unit develops a control signal for applying a disabling signal to a chip selection terminal included in the random access memory, whereby a load such as a central processor unit connected to the random access memory is electrically disconnected from the random access memory to minimize the power dissipation.
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申请公布号 |
US4399524(A) |
申请公布日期 |
1983.08.16 |
申请号 |
US19810235621 |
申请日期 |
1981.02.18 |
申请人 |
SHARP KABUSHIKI KAISHA |
发明人 |
MUGURUMA, NORIO;MORIHISA, MITSUO;AKAO, HIDEYUKI |
分类号 |
G06F12/16;G06F1/26;G06F1/32;G11C5/00;G11C5/14;H02J9/06;H03K17/00;H03K17/24;(IPC1-7):G11C7/00 |
主分类号 |
G06F12/16 |
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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