Data transfer device, method of transferring data, and image forming apparatus
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United States of America Patent
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Sep 16, 2014
Grant Date -
Feb 23, 2012
app pub date -
Aug 17, 2011
filing date -
Aug 23, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A data transfer device controls data transfer performed through a bus capable of separately processing a request and a response. The data transfer device include a plurality of access control units that produce a data transfer process according to the request; and an arbitration unit that performs arbitration between the requests issued by the plurality of access control units so as to determine a request to be accepted among those requests. The arbitration unit sets an arbitration prohibited period in which the arbitration is prohibited for a designated period and accepts only the request issued by a designated access control unit among the plurality of access control units during the arbitration prohibited period.
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