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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  
5.3 Automatic Power-Saving Operations  
The ICS1893AF has power-saving features that automatically minimize its total power consumption while it  
is operating. Table 5-1 lists the ICS1893AF automatic power-saving features for the various modes.  
Table 5-1. Automatic Power-Saving Features, 10Base-T and 100Base-TX Modes  
Power-  
Saving  
Feature  
Mode for ICS1893AF  
10Base-T Mode  
100Base-TX Mode  
Disable Inter- In 10Base-T mode, the ICS1893AF  
nal Modules disables all its internal 100Base-TX  
modules.  
In 100Base-TX mode, the ICS1893AF  
disables all its internal 10Base-T modules.  
STA Control When an STA sets the state of the  
of Automatic ICS1893AF Extended Control Register 2,  
When an STA sets the state of the  
ICS1893AF Extended Control Register 2,  
bit 19.1 to logic:  
Zero, the 10Base-T modules always  
remain enabled, even during  
100Base-TX operations.  
Power-  
Saving  
Features  
bit 19.0 to logic:  
Zero, the 100Base-TX modules always  
remain enabled, even during 10Base-T  
operations.  
One, the ICS1893AF automatically  
disables 100Base-TX modules while the  
ICS1893AF is operating in 10Base-T  
mode.  
One, the ICS1893AF automatically  
disables 10Base-T modules while the  
ICS1893AF is operating in 100Base-TX  
mode.  
5.4 Auto-Negotiation Operations  
The ICS1893AF has an Auto-Negotiation sublayer and provides a Control Register bit (bit 0.12) to  
determine whether its Auto-Negotiation sublayer is enabled or disabled.  
When enabled, the ICS1893AF Auto-Negotiation sublayer exchanges technology capability data with its  
remote link partner and automatically selects the highest-performance operating mode it has in common  
with its remote link partner. For example, if the ICS1893AF supports 100Base-TX and 10Base-T modes –  
but its link partner supports 100Base-TX and 100Base-T4 modes – the two devices automatically select  
100Base-TX as the highest-performance common operating mode. For details regarding initialization and  
control of the auto-negotiation process, see Section 7.2, “Functional Block: Auto-Negotiation”.  
ICS1893AF
Copyright © 2004, Integrated Circuit Systems, Inc.  
All rights reserved.  
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