lxt9785 Intel Corporation, lxt9785 Datasheet - Page 5
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lxt9785
Manufacturer Part Number
lxt9785
Description
Advanced 8-port 10/100 Mbps Phy Transceivers
Manufacturer
Intel Corporation
Datasheet
1.LXT9785.pdf
(226 pages)
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5.0
Datasheet
Document Number: 249241
Revision Number: 007
Revision Date: August 28, 2003
4.10
4.11
4.12
4.13
4.14
Application Information ............................................................................................................164
5.1
5.2
4.9.1
4.9.2
4.9.3
10 Mbps Operation ...........................................................................................................150
4.10.1 Preamble Handling ..............................................................................................150
4.10.2 Dribble Bits ..........................................................................................................151
4.10.3 Link Test ..............................................................................................................151
4.10.4 Jabber ..................................................................................................................151
DTE Discovery Process ....................................................................................................152
4.11.1 Definitions ............................................................................................................152
4.11.2 Interaction between Processor, MAC, and PHY ..................................................153
4.11.3 Management Interface and Control .....................................................................153
4.11.4 DTE Discovery Process Flow ..............................................................................154
4.11.5 DTE Discovery Behavior......................................................................................155
Monitoring Operations ......................................................................................................157
4.12.1 Monitoring Auto-Negotiation ................................................................................157
4.12.2 Per-Port LED Driver Functions ............................................................................157
4.12.3 Out-of-Band Signaling .........................................................................................158
4.12.4 Boundary Scan Interface .....................................................................................159
4.12.5 State Machine ......................................................................................................159
4.12.6 Instruction Register ..............................................................................................159
4.12.7 Boundary Scan Register ......................................................................................159
Cable Diagnostics Overview .............................................................................................160
4.13.1 Features...............................................................................................................160
4.13.2 Operation .............................................................................................................160
4.13.3 Implementation Considerations ...........................................................................161
4.13.4 Basic Implementation ..........................................................................................161
Link Hold-Off Overview .....................................................................................................162
4.14.1 Features...............................................................................................................162
4.14.2 Operation .............................................................................................................163
Design Recommendations................................................................................................164
General Design Guidelines ...............................................................................................164
5.2.1
5.2.2
5.2.3
5.2.4
100BASE-X Network Operations .........................................................................145
100BASE-X Protocol Sublayer Operations..........................................................145
4.9.2.1
PMA Sublayer ......................................................................................................147
4.9.3.1
4.9.3.2
4.9.3.3
4.9.3.4
4.9.3.5
4.9.3.6
4.9.3.7
4.10.3.1 Link Failure ..........................................................................................151
4.13.2.1 Short and Long Cable Testing Requirements ......................................160
4.13.2.2 Precision ..............................................................................................160
Power Supply Filtering .........................................................................................164
Power and Ground Plane Layout Considerations................................................165
5.2.2.1
MII Terminations ..................................................................................................165
Twisted-Pair Interface ..........................................................................................165
5.2.4.1
PCS Sublayer ......................................................................................145
Link ......................................................................................................148
Link Failure Override............................................................................148
Carrier Sense/Data Valid (RMII) ..........................................................148
Carrier Sense (SMII) ............................................................................148
Receive Data Valid (SMII)....................................................................148
Twisted-Pair PMD Sublayer .................................................................149
Fiber PMD Sublayer.............................................................................149
Chassis Ground ...................................................................................165
Magnetic Requirements .......................................................................166
Contents
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