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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 8 Management Register Set  
When this reserved bit is read by an STA, the ICS1893AF 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 ICS1893AF, 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 ICS1893AF isolates all STA writes to bit 4.14.  
One, an STA can modify the value of bit 4.14.  
8.6.3 Remote Fault (bit 4.13)  
When the ICS1893AF Auto-Negotiation sublayer is enabled, the ICS1893AF 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 ICS1893AF exchanges with its remote link partner. The ICS1893AF 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 ICS1893AF does not detect a link fault, it clears bit 4.13  
to logic zero.  
Whenever the ICS1893AF:  
Does not detect a link fault, the ICS1893AF 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.  
8.6.4 IEEE Reserved Bits (bits 4.12:10)  
The IEEE reserves these bits for future use. When an STA:  
Reads a reserved bit, the ICS1893AF returns a logic zero.  
Writes to a reserved bit, it must use the default value specified in this data sheet.  
The ICS1893AF uses some reserved bits to invoke auxiliary functions. To ensure proper operation of the  
ICS1893AF, 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.  
ICS1893AF,
Copyright © 2004, Integrated Circuit Systems, Inc.  
All rights reserved.  
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