Program and erase disabling control of WPCAM by double controls

Details Program and erase disabling control of WPCAM by double controls Program and erase disabling control of WPCAM by double controls

2011-04-26

2011-04-26

Kim, Matt (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711SE12091

Reexamination Certificate

active

07934051

ABSTRACT:
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.

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