Microcontroller with configurable instruction set

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 ins...

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Bibliographic Details
Main Authors DRAKE RODNEY JAY, RICHARDSON DAVID ALAN
Format Patent
LanguageEnglish
Published 30.07.2002
Edition7
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary: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.
Bibliography:Application Number: US19990304745