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1893CKI-40LF Datasheet(PDF) 7 Page - Integrated Device Technology |
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1893CKI-40LF Datasheet(HTML) 7 Page - Integrated Device Technology |
7 / 121 page Chapter 3 Overview of the ICS1893CK-40 ICS1893CK-40, Rev. C, 06/02/09 June 2009 7 ICS1893CK-40 Data Sheet Rev. C - Release Copyright © 2009, Integrated Device Technology, Inc. All rights reserved. Chapter 3 Overview of the ICS1893CK-40 The ICS1893CK-40 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 ICS1893CK-40 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 ICS1893CK-40 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 ICS1893CK-40 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 ICS1893CK-40 can interface directly to the MAC. The ICS1893CK-40 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 ICS1893CK-40 does not affect, nor is it affected by, the underlying structure of the MAC frame it is conveying. |
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