发明名称 |
RAM/ROM hybrid memory architecture |
摘要 |
An integrated circuit memory which includes at least some RAM/ROM hybrid columns. The RAM/ROM hybrid cells operate as normal SRAM cells forever, unless and until they are programmed to operate as ROM cells. Thus users who need the extra security permitted by ROM encoding can have this capability, while users who do not need ROM encoding can use off-the-shelf parts as RAM only. |
申请公布号 |
US4995004(A) |
申请公布日期 |
1991.02.19 |
申请号 |
US19890352142 |
申请日期 |
1989.05.15 |
申请人 |
DALLAS SEMICONDUCTOR CORPORATION |
发明人 |
LEE, ROBERT D. |
分类号 |
G06F3/023;G06F3/033;G06F3/038;G06F3/048;G06K7/00;G06K19/077;G11C5/00;G11C5/06;G11C7/24;G11C8/20 |
主分类号 |
G06F3/023 |
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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