Content terminated DMA

Details Content terminated DMA Content terminated DMA

2011-04-26

2011-04-26

Lee, Chun-Kuan (Department: 2181)

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

C710S026000, C710S028000

Reexamination Certificate

active

07934025

ABSTRACT:
A Content-Terminated Direct Memory Access (CT-DMA) circuit autonomously transfers data of an unknown length from a source to a destination, terminating the transfer based on the content of the data. Filter criteria are provided to the CT-DMA prior to the data transfer. The filter criteria include pattern data that are compared to transfer data, and transfer termination rules for interpreting the comparison results. Data are written to the destination until the filter criteria are met. Representative filter criteria may include that one or more units of transfer data match pattern data; that one or more units of transfer data fail to match pattern data; or that one or more units of transfer data match pattern data a predetermined number of times.

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