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ICS1893BYI-10LF 参数 Datasheet PDF下载

ICS1893BYI-10LF图片预览
型号: ICS1893BYI-10LF
PDF下载: 下载PDF文件 查看货源
内容描述: 3.3 -V的10Base -T / 100BASE - TX集成PHYceiver [3.3-V 10Base-T/100Base-TX Integrated PHYceiver]
分类和应用:
文件页数/大小: 143 页 / 1665 K
品牌: ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
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ICS1893BY-10 - Release  
Chapter 7 Management Register Set  
7.6.1 Next Page (bit 4.15)  
This bit indicates whether the ICS1893BY-10 uses the Next Page Mode functions during the  
auto-negotiation process. If bit 4.15 is logic:  
Zero, then the ICS1893BY-10 indicates to its remote link partner that these features are disabled.  
(Although the default value of this bit is logic zero, the ICS1893BY-10 does support the Next Page  
function.)  
One, then the ICS1893BY-10 advertises to its remote link partner that this feature is enabled.  
7.6.2 IEEE Reserved Bit (bit 4.14)  
The ISO/IEC specification reserves this bit for future use. However, the ISO/IEC Standard also defines bit  
4.14 as the Acknowledge bit.  
When this reserved bit is read by an STA, the ICS1893BY-10 returns a logic zero. However, whenever an  
STA writes to this reserved bit, it must use the default value specified in this data sheet. ICS uses some  
reserved bits to invoke auxiliary functions. To ensure proper operation of the ICS1893BY-10, an STA must  
maintain the default value of these bits. Therefore, ICS recommends that an STA always write the default  
value of any reserved bits during all management register write operations.  
Reserved bit 4.14 is a Command Override Write (CW) bit. Whenever bit 16.15 (the Command Register  
Override bit) is logic:  
Zero, the ICS1893BY-10 isolates all STA writes to bit 4.14.  
One, an STA can modify the value of bit 4.14.  
7.6.3 Remote Fault (bit 4.13)  
When the ICS1893BY-10 Auto-Negotiation sublayer is enabled, the ICS1893BY-10 transmits the Remote  
Fault bit 4.13 to its remote link partner during the auto-negotiation process. The Remote Fault bit is part of  
the Link Code Word that the ICS1893BY-10 exchanges with its remote link partner. The ICS1893BY-10 sets  
this bit to logic one whenever it detects a problem with the link, locally. The data in this register is sent to the  
remote link partner to inform it of the potential problem. If the ICS1893BY-10 does not detect a link fault, it  
clears bit 4.13 to logic zero.  
Whenever the ICS1893BY-10:  
Does not detect a link fault, the ICS1893BY-10 clears bit 4.13 to logic zero.  
Detects a problem with the link, during the auto-negotiation process, this bit is set. As a result, the data  
on this bit is sent to the remote link partner to inform it of the potential problem.  
7.6.4 IEEE Reserved Bits (bits 4.12:10)  
The IEEE reserves these bits for future use. When an STA:  
Reads a reserved bit, the ICS1893BY-10 returns a logic zero.  
Writes to a reserved bit, it must use the default value specified in this data sheet.  
The ICS1893BY-10 uses some reserved bits to invoke auxiliary functions. To ensure proper operation of  
the ICS1893BY-10, an STA must maintain the default value of these bits. Therefore, ICS recommends that  
during any STA write operation, an STA write the default value to all reserved bits, even those bits that are  
Read Only.  
ICS1893BY-10 Rev A 3/24/04  
March, 2004  
Copyright © 2004, Integrated Circuit Systems, Inc.  
All rights reserved.  
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