參數(shù)資料
型號: MD8412B
廠商: Electronic Theatre Controls, Inc.
英文描述: LINK(IEEE 1394)
中文描述: 鏈接(1394)
文件頁數(shù): 16/114頁
文件大?。?/td> 577K
代理商: MD8412B
MD8412B
4
FUJIFUILM MICRODEVICES CO., LTD.
Ver 1.10
1-4-6
Isochronous transfer functions
The MD8412B possesses isochronous functions. It incorporates a cycle timer so that a cycle start packet can be transmit-
ted in the unit of 125ìec when the node seizing the MD8412B is of the cycle master. Its trigger is an 8KHz signal entered
through the CYCLEIN pin, obtained as a result of generation of a clock signal of 49.152MHz, coming from the PHY chip.
When the above-mentioned node is not of the cycle master, synchronism with the cycle master is secured through com-
pensation of the cycle master within the MD8412B, based on the value of that packet, each time a cycle start packet is
received from another cycle master node.
The MD8412B is provided with two types of isochronous modes. One is a mode intended to gain access to the host with
a packet image. The other is a mode for host access with an image of data themselves. (To be described in detail later)
The user determines the mode, according to the nature of data source to be handled in the isochronous transfer mode.
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