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:
Oct. 30, 2001
Filed:
Aug. 08, 2000
Natarajan Seshan, Houston, TX (US);
Jeffrey R. Quay, Royse City, TX (US);
Kenneth L. Williams, Sherman, TX (US);
Michael J. Moody, McKinney, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A microprocessor,is described which includes a direct memory access (DMA) circuitry,. DMA,is interconnected with a program memory,and a data memory,and is operational to transfer data to or from these memories. DMA,is interconnected with a peripheral bus,and thereby to various peripherals internal to microprocessor,. DMA,is also interconnected with an external memory interface,and thereby to various external memory circuits and peripherals external to microprocessor,. An auxiliary channel control circuitry,provides DMA transfers by interacting with a peripheral such as host port,which has its own address generation circuitry. DMA,provides frame synchronization for triggering a frame transfer, or group of transfers. DMA,is auto-initialized through registers. DMA action complete pins DMAC,indicate DMA status to external devices. DMA,allows for local variability of transfer rates in a split channel mode of operation by allowing a transmit channel to get ahead of a corresponding receive channel by a preselected number of data words.