Eight-bit microcontroller having a risc architecture
CA 2275172 C · Owner: Atmel Corporation · Inventors: Woolan, Vegard; Bryant, John D.; Myklebust, Gaute
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An eight-bit RISC based microcontroller (Fig. 1) includes an eight-bit register file (20) having a dedicated arithmetic logic unit (ALU<u>2</u>) in , addition to a general purpose eight-bit ALU (22). The register file further includes means for combining (16) a pair of registers to provide a logical sixteen-bit register for indirect addressing. The dedicated ALU is a sixteenbit ALU which provides certain arithmetic functions for the register pair thus alleviating the computational burdens that would otherwise be imposed on the general purpose eight-bit ALU. A further feature of the invention is the inclusion of a paging register (RAMP x y, z) which is combined with the , contents (14') …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 13, 1998 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.