Static information storage and retrieval – Read/write circuit – Having fuse element
Reexamination Certificate
2008-06-18
2010-02-16
Dinh, Son (Department: 2824)
Static information storage and retrieval
Read/write circuit
Having fuse element
C365S189080, C365S230060
Reexamination Certificate
active
07663957
ABSTRACT:
A microprocessor includes re-writeable non-volatile state (RNS) addressable by an instruction executed by the microprocessor that instructs the microprocessor to write a new value to the RNS. A plurality of fuses are each readable to determine whether the fuse is blown or unblown, in response to the microprocessor decoding the instruction. A Boolean logic unit performs Boolean operations on the values read from the plurality of fuses to determine a current RNS value. A fuse blowing device blows at least one unblown fuse to change the current RNS value to the new value when the new value is different than the current value. The microprocessor can read the plurality of fuses, perform the Boolean operations, and blow at least one unblown fuse to change the current value of the RNS to a new value multiple times in response to a program running on the microprocessor executing the instruction multiple times.
REFERENCES:
patent: 5790783 (1998-08-01), Lee et al.
patent: 5946497 (1999-08-01), Lee et al.
patent: 7242615 (2007-07-01), Nagashima
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Henry G. Glenn
Jain Dinesh K.
Parks Terry
Davis E. Alan
Dinh Son
Huffman James W.
VIA Technologies Inc.
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