參數(shù)資料
型號： 1893YI-10
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 網(wǎng)絡(luò)接口
英文描述： DATACOM, INTERFACE CIRCUIT, PQFP64
封裝： 10 X 10 MM, TQFP-64
文件頁數(shù)： 92/152頁
文件大?。?/td> 943K
代理商： 1893YI-10
ICS1893 Rev C 6/6/00
June, 2000
44
Chapter 7
Functional Blocks
ICS1893 Data Sheet - Release
Copyright 2000, Integrated Circuit Systems, Inc.
All rights reserved.
7.3
Functional Block: 100Base-X PCS and PMA Sublayers
The ICS1893 is fully compliant with clause 24 of the ISO/IEC specification, which defines the 100Base-X
Physical Coding sublayer (PCS) and Physical Medium Attachment (PMA) sublayers.
7.3.1
PCS Sublayer
The ICS1893 100Base-X PCS sublayer provides two interfaces: one to a MAC/repeater and the other to
the ICS1893 PMA sublayer. An ICS1893’s PCS sublayer performs the transmit, receive, and control
functions and consists of the following:
PCS Transmit sublayer, which provides the following:
– Parallel-to-serial conversion
– 4B/5B encoding
– Collision detection
PCS Receive sublayer, which provides the following:
– Serial-to-parallel conversion
– 4B/5B encoding
– Carrier detection
– Code group framing
PCS control functions, which provide:
– Assertion of the CRS (carrier sense) signal
– Assertion of the COL (collision detection) signal
Note:
When configured for 100M Symbol mode operations, the MAC/Repeater Interface bypasses most
of the PCS. When the ICS1893 MAC/Repeater Interface is in this mode, most of its PCS Transmit
and Receive modules are inactive. However, its PCS control functions (CRS and COL) remain
operational.
7.3.2
PMA Sublayer
The ICS1893 100Base-X PMA Sublayer consists of two interfaces: one to the Physical Coding sublayer
and the other to the Physical Medium Dependent sublayer. Functionally, the PMA sublayer is responsible
for the following:
Link Monitoring
Carrier Detection
NRZI encoding/decoding
Transmit Clock Synthesis
Receive Clock Recovery
相關(guān)PDF資料
PDF描述
1894-40KLF DATACOM, INTERFACE CIRCUIT, QCC40
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1895230000 15 A, STRIP TERMINAL BLOCK, 2 ROWS, 2 DECKS
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