The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 2006
Filed:
Oct. 14, 2003
Bor-sung Liang, Kaohsiung, TW;
Bor-Sung Liang, Kaohsiung, TW;
Sunplus Technology Co., Ltd., , TW;
Abstract
A processor and method of automatic instruction mode switching between N-bit and 2N-bit instructions by using parity bit check. The processor and method includes an instruction input device having a memory for storing a plurality of 2N-bit words, an instruction fetch device fetching a 2N-bit word from the memory, and a mode switch logic determining whether the 2N-bit word fetched by the instruction fetch device is two (N-P)-bit instructions or one 2(N-P)-bit instruction to accordingly switch the processor to corresponding N-bit or 2N-bit mode, wherein when the 2N-bit word fetched is even parity, the 2N-bit word is determined as two (N-P)-bit instructions if two N-bit words included in the 2N-bit word are on the even parity state, or determined as a 2(N-P)-bit instruction if the two N-bit words are on the odd parity state.