A micro processor and a method for writing a new value of a duplicable non volatile state of the micro processor thereof

Abstract

The invention relates to a micro processor for executing an order for addressing a duplicable non volatile state to write a new value into the duplicable non volatile state by the micro processor. A plurality of fuse wires are read out by the micro processor respectively to judge whether each fuse wire is fused, in order to respond with the order decoded by the micro processor. A Boolean logic unit is used for executing Boolean calculation on values read out from the plurality of fuse wires, in order to decide a current value of the duplicable non volatile state. When the new value is different from the current value, a fuse wire fusing device is used for fusing at least one non-fused fuse wire to change the current value of the duplicable non volatile state into the new value. Responsiveto the procedure executed by the micro processor and the order executed for many times, the micro processor can read out the plurality of fuse wires, execute Boolean operation, and fuse at least one non-fused fuse wire to change the current value of the duplicable non volatile state into the new value.

Description

Microprocessor and its new value writing method for rewritable non-volatile state technical field The present invention relates to microprocessors, and more particularly to storing non-volatile state in a microprocessor. Background technique It is known that a computer system includes various forms of rewritable non-volatile (non-volatile) memory, such as tape, disk, CMOS, battery or flash memory. However, these resources are usually managed by system software, such as the basic input output system (BIOS) or operating system, so there is no way for them to be used internally by some application software or the microprocessor. Again, these memories are external to the system's microprocessor. To provide serial numbers or other chip-specific information, microprocessors will have a small amount of non-volatile random access memory (non-volatile random access memory, NVRAM), located in the same package but different from the microprocessor core. )superior. Wherein, the tw...

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Problems solved by technology

However, as mentioned above, it is expensive to manufacture non-volatile RAM (such as flash memory) on the microprocessor, and adding a separate non-volatile random-access memory in the same package as the microprocessor is also expensive. expensive

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