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39.IEEE 1394 agreement structured?

In Electronic Infomation Category: 3 | on September 30,2011

IEEE 1394 bus standard important feature is that it has developed a set of three protocols to standardize the host and 39 datasheet and interact through the serial bus peripheral. The three agreements include: the exchange layer, link layer and 39 price and physical layer. Management of these three levels of the bus link.

(1) exchange layer: Defines the request response protocol to perform bus transfers, it hides the users application of low-level details of the IEEE 1394 saddle. The transport layer protocol for asynchronous read / write and 39 suppliers and lock functions to provide support.

(2) Link Layer: IEEE 1394 is a packet-based protocol standards. It defines the form of packet data transmission service. Addressing data transfer, data validation, and serial data packet produced in this layer to complete. It is asynchronous transmission and synchronous transmission of data packets to provide packet transfer function.

(3) physical layer: Depending on the physical bus medium, in the physical layer data link layer logic signals into actual physical signals, but also provide a guarantee that only one device for each data transfer arbitration services. The physical layer and protocol sub-layer contains the physical medium dependent sublayer, and two sub-layers.

(4) Bus Management: It provides the basic control functions and standard CSRs, each node on the bus these are necessary.

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