Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2007-01-16
2011-11-29
Rutz, Jared (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S170000
Reexamination Certificate
active
08069325
ABSTRACT:
A memory region protection unit is disclosed that comprises a first register for storing a memory region address, a second register for storing the memory region size, an arithmetic function block for executing an arithmetic function on a memory address provided to the region protection unit and the address value in the first register. The unit further has a comparator for comparing the output of the arithmetic function block with the size value in the second register, the comparator being coupled to an output for signalling the validity of the memory address on the bus The region protection unit has a controller configured to retrieve the memory region address and the memory region size from instructions issued to the region protection unit for associating the unit with said region, and to dissociate the unit from its memory region in response to a further instruction.
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Bussa Nagaraju
Seshua Udaya
Vermeulen Hubertus G. H.
Bertram Ryan
NXP B.V.
Rutz Jared
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