ICS1892Y IDT, Integrated Device Technology Inc, ICS1892Y Datasheet - Page 99
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ICS1892Y
Manufacturer Part Number
ICS1892Y
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.ICS1892Y.pdf
(148 pages)
Specifications of ICS1892Y
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8.14.1 Node/Repeater Configuration (bit 19.15)
8.14.2 Hardware/Software Priority Status (bit 19.14)
8.14.3 Remote Fault (bit 19.13)
8.14.4 ICS Reserved (bits 19.12:2)
ICS1892, Rev. D, 2/26/01
The Node/Repeater Configuration bit directly indicates the state of the NOD/REP input pin. When this bit is
logic:
•
•
There are two primary differences between Node mode and Repeater mode.
•
•
The Hardware/Software Priority Status bit directly indicates the state of the HW/SW pin. When this bit is
logic:
•
•
The ISO/IEC specification defines bit 5.13 as the Remote Fault bit, and bit 19.13 is functionally identical to
bit 5.13. The Remote Fault bit is set based on the Link Control Word received from the remote link partner.
When this bit is a logic:
•
•
ICS reserves these bits for future use. Functionally, these bits are equivalent to an IEEE Reserved bit.
When each of these reserved bits is:
•
•
In general, ICS uses some reserved bits to invoke auxiliary functions. To ensure proper operation of the
ICS1892, 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.
Zero, the NOD/REP input pin is pulled down, which instructs the operation code to operate in Node
mode.
One, the NOD/REP input pin is pulled up, which instructs the ICS1892 to operate in Repeater mode.
In Node mode:
In Repeater mode:
Zero, the hardware pins have priority over the (software) register bits for establishing the ICS1892
configuration.
One, the (software) register bits have priority over the hardware pins for establishing the ICS1892
configuration.
Zero, it indicates the remote link partner does not detect a Link Fault.
One, it indicates to the ICS1892/STA that the remote link partner detects a Link Fault.
Read by an STA, the ICS1892 returns a logic zero.
Written to by an STA, the STA must use the default value specified in this data sheet.
– The SQE Test default setting is enabled.
– The Carrier Sense signal (CRS) is asserted in response to either transmit or receive activity.
– The SQE Test default setting is disabled.
– The Carrier Sense signal (CRS) is asserted in response only to receive activity.
ICS1892
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
99
Chapter 8 Management Register Set
February 26, 2001
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