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1893CF 参数 Datasheet PDF下载

1893CF图片预览
型号: 1893CF
PDF下载: 下载PDF文件 查看货源
内容描述: [Interface Circuit, 1-Trnsvr, CMOS, PDSO48, 0.300 MM INCH, SSOP-48]
分类和应用: 网络接口电信集成电路电信电路光电二极管
文件页数/大小: 136 页 / 1040 K
品牌: IDT [ INTEGRATED DEVICE TECHNOLOGY ]
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ICS1893AF Data Sheet - Release  
Chapter 5 Operating Modes Overview  
5.5 100Base-TX Operations  
The ICS1893AF 100Base-TX mode provides 100Base-TX physical layer (PHY) services as defined in the  
ISO/IEC 8802-3 standard. In the 100Base-TX mode, the ICS1893AF is a 100M translator between a MAC  
and the physical transmission medium. As such, the ICS1893AF has two interfaces, both of which are fully  
configurable: one to the MAC/repeater and one to the Link Segment. In 100Base-TX mode, the ICS1893AF  
provides the following functions:  
Data conversion from both parallel-to-serial and serial-to-parallel formats  
Data encoding/decoding (4B/5B, NRZ/NRZI, and MLT-3)  
Data scrambling/descrambling  
Data transmission/reception over a twisted-pair medium  
To accurately transmit and receive data, the ICS1893AF employs DSP-based wave shaping, adaptive  
equalization, and baseline wander correction. In addition, in 100Base-TX mode, the ICS1893AF provides a  
variety of control and status means to assist with Link Segment management. For more information on  
100Base-TX, see Section 7.4, “Functional Block: 100Base-TX TP-PMD Operations”.  
5.6 10Base-T Operations  
The ICS1893AF 10Base-T mode provides 10Base-T physical layer (PHY) services as defined in the  
ISO/IEC 8802-3 standard. In the 10Base-T mode, the ICS1893AF is a 10M translator between a  
MAC/repeater and the physical transmission medium. In 10Base-T mode, the ICS1893AF provides the  
following functions:  
Data conversion from both parallel-to-serial and serial-to-parallel formats  
Manchester data encoding/decoding  
Data transmission/reception over a twisted-pair medium  
5.7 Half-Duplex and Full-Duplex Operations  
The ICS1893AF supports half-duplex and full-duplex operations for both 10Base-T and 100Base-TX  
applications. Full-duplex operation allows simultaneous transmission and reception of data, which  
effectively doubles the Link Segment throughput to either 20 Mbps (for 10Base-T operations) or 200 Mbps  
(for 100Base-TX operations).  
As per the ISO/IEC standard, full-duplex operations differ slightly from half-duplex operations. These  
differences are necessary, as during full-duplex operations a PHY actively uses both its transmit and  
receive data paths simultaneously.  
In 10Base-T full-duplex operations, the ICS1893AF disables its loopback function (that is, it does not  
automatically loop back data from its transmitter to its receiver) and disables its SQE Test function.  
In both 10Base-T and 100Base-TX full-duplex operations, the ICS1893AF asserts its CRS signal only in  
response to receive activity while its COL signal always remains inactive.  
For more information on half-duplex and full-duplex operations, see the following sections:  
Section 8.2, “Register 0: Control Register”  
Section 8.2.8, “Duplex Mode (bit 0.8)”  
Section 8.3, “Register 1: Status Register”  
Section 8.6, “Register 4: Auto-Negotiation Register”  
ICS1893AF,
Copyright © 2004, Integrated Circuit Systems, Inc.  
All rights reserved.  
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