发明名称 Program and erase disabling control of WPCAM by double controls
摘要 The present invention provides a semiconductor device and a method for controlling the semiconductor device, the semiconductor device including memory regions that include nonvolatile memory cells; program prohibition information units, the program prohibition information units storing program prohibition information to be used for determining whether to prohibit or allow programming in a plurality of memory regions corresponding to the program prohibition information units; a first prohibition information control circuit that prohibits a change of the program prohibition information from a program prohibiting state to a program allowing state with respect a memory region, the memory region is one of the plurality of corresponding memory regions, based on first prohibition information to be used for determining whether to prohibit a change of the program prohibition information from a program prohibiting state to a program allowing state with respect to the corresponding memory region; and a second prohibition information control circuit that prohibits a change of the program prohibition information from a program allowing state to a program prohibiting state with respect to the corresponding memory region, based on second prohibition information to be used for determining whether to prohibit a change of the program prohibition information from a program allowing state to a program prohibiting state with respect to the corresponding memory region.
申请公布号 US7934051(B2) 申请公布日期 2011.04.26
申请号 US20080012390 申请日期 2008.02.01
申请人 SPANSION LLC 发明人 SHIBATA KENJI;OKURA MASAHIKO;NAGAO MITSUHIRO
分类号 G06F12/00 主分类号 G06F12/00
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