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:
Feb. 13, 2001
Filed:
Jun. 09, 1998
Yew-Koon Tan, San Jose, CA (US);
Shuichi Maeda, Sunnyvale, CA (US);
Other;
Abstract
A digital signal processor which supports an instruction set including both 16-bit instructions and 32-bit instructions, so that particular portions of a program requiring only 16-bit instructions may be encoded in a 16-bit mode, thus reducing the program memory needed to store these portions. The digital signal processor switches between the 16- and 32-bit modes only in response to flow control instructions such as JUMP, CALL or RETURN instructions. JUMP and CALL instructions are coded to indicate the processor mode applicable to the instructions to which the JUMP or CALL instruction goes to, so that the processor may change modes as needed when executing the JUMP or CALL instruction. When a CALL is executed the current processor mode is stored on the processor's stack, so that in response to a RETURN instruction the processor can return to this mode by retrieving the stored mode from the stack.