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:
Mar. 13, 2001
Filed:
May. 28, 1998
Ronald Sullivan, Elgin, IL (US);
3Com Corporation, Santa Clara, CA (US);
Abstract
A system linking a serial interface with a processor that is parallel in nature is described. A system memory having a receive buffer stores data from a UART destined for processing by a central processing unit. A control state machine interrupts the central processing unit to initiate processing of the data in the receive buffer when the receive buffer reaches a certain state, such as storing a full frame of data. Command characters indicative of control conditions in the data stream are detected by discrete hardware in a receive command processor, and the memory address in the receive buffer is forwarded to the central processing unit. The resulting system substantially improves the speed and efficiency of the transfer of data between the UART and the central processing unit.