Microcontroller with configurable instruction set

There are no applications related to the present application. An embeddable microcontroller is provided. The microcontroller has program memory for storing instructions. An instruction decoder feteches instructions, decodes them, and forwards them to an enabler. The enabler checks a status bit or co...

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Bibliographic Details
Main Authors Richardson, David Alan, Drake, Rodney Jay
Format Patent
LanguageEnglish
Published 30.07.2002
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Abstract There are no applications related to the present application. An embeddable microcontroller is provided. The microcontroller has program memory for storing instructions. An instruction decoder feteches instructions, decodes them, and forwards them to an enabler. The enabler checks a status bit or consults a pre-defined lookup table to determine whether the instruction at hand should be executed. If the status bit is set to ENABLE, or the instruction appears on a list of enabled instructions, the decoded instruction is forwarded to the central processing unit for execution. Otherwise, if the status bit is set to DISABLE, or the decoded instruction does not appear on the pre-defined list of enabled instructions, then the instruction is not forwarded to the central processing unit, effectively disabling the instruction.
AbstractList There are no applications related to the present application. An embeddable microcontroller is provided. The microcontroller has program memory for storing instructions. An instruction decoder feteches instructions, decodes them, and forwards them to an enabler. The enabler checks a status bit or consults a pre-defined lookup table to determine whether the instruction at hand should be executed. If the status bit is set to ENABLE, or the instruction appears on a list of enabled instructions, the decoded instruction is forwarded to the central processing unit for execution. Otherwise, if the status bit is set to DISABLE, or the decoded instruction does not appear on the pre-defined list of enabled instructions, then the instruction is not forwarded to the central processing unit, effectively disabling the instruction.
Author Drake, Rodney Jay
Richardson, David Alan
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