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ICS1893CFI Datasheet(PDF) 7 Page - Integrated Circuit Systems |
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ICS1893CFI Datasheet(HTML) 7 Page - Integrated Circuit Systems |
7 / 126 page Chapter 3 Overview of the ICS1893CF ICS1893CF, Rev. F, 03/01/07 Mar. 2007 7 ICS1893CF Data Sheet Rev. F - Release Copyright © 2007, Integrated Device Technology, Inc. All rights reserved. Chapter 3 Overview of the ICS1893CF The ICS1893CF is a stream processor. During data transmission, it accepts sequential nibbles from its MAC (Media Access Control) converts them into a serial bit stream, encodes them, and transmits them over the medium through an external isolation transformer. When receiving data, the ICS1893CF converts and decodes a serial bit stream (acquired from an isolation transformer that interfaces with the medium) into sequential nibbles. It subsequently presents these nibbles to its MAC Interface. The ICS1893CF implements the OSI model’s physical layer, consisting of the following, as defined by the ISO/IEC 8802-3 standard: • Physical Coding sublayer (PCS) • Physical Medium Attachment sublayer (PMA) • Physical Medium Dependent sublayer (PMD) • Auto-Negotiation sublayer The ICS1893CF is transparent to the next layer of the OSI model, the link layer. The link layer has two sublayers: the Logical Link Control sublayer and the MAC sublayer. The ICS1893CF can interface directly to the MAC. The ICS1893CF transmits framed packets acquired from its MAC Interface and receives encapsulated packets from another PHY, which it translates and presents to its MAC Interface. Note: As per the ISO/IEC standard, the ICS1893CF does not affect, nor is it affected by, the underlying structure of the MAC frame it is conveying. |
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