KSZ8895RQXIA Ver la hoja de datos (PDF) - Micrel
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KSZ8895RQXIA Datasheet PDF : 128 Pages
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Micrel, Inc.
KSZ8895MQX/RQX/FQX/ML
Contents
General Description......................................................................................................................................................... 1
Functional Diagram ......................................................................................................................................................... 1
Applications ..................................................................................................................................................................... 3
Ordering Information ....................................................................................................................................................... 3
Revision History .............................................................................................................................................................. 3
System Level Application .............................................................................................................................................. 15
Pin Configuration ........................................................................................................................................................... 17
Pin Description .............................................................................................................................................................. 19
Pin for Strap-in Options ................................................................................................................................................. 27
Introduction.................................................................................................................................................................... 31
Functional Overview: Physical Layer Transceiver ........................................................................................................ 31
100BASE-TX Transmit .............................................................................................................................................. 31
100BASE-TX Receive ............................................................................................................................................... 31
PLL Clock Synthesizer............................................................................................................................................... 32
Scrambler/Descrambler (100BASE-TX only) ............................................................................................................ 32
100BASE-FX Operation ............................................................................................................................................ 32
100BASE-FX Signal Detection .................................................................................................................................. 32
100BASE-FX Far End Fault ...................................................................................................................................... 32
10BASE-T Transmit................................................................................................................................................... 32
10BASE-T Receive.................................................................................................................................................... 32
MDI/MDI-X Auto Crossover ....................................................................................................................................... 32
Straight Cable ........................................................................................................................................................ 33
Crossover Cable .................................................................................................................................................... 34
Auto-Negotiation ........................................................................................................................................................ 34
LinkMD® Cable Diagnostics....................................................................................................................................... 36
Access.................................................................................................................................................................... 36
Usage ..................................................................................................................................................................... 36
A LinkMD example ................................................................................................................................................. 37
On-chip Termination Resistors .................................................................................................................................. 37
Internal 1.2V LDO Controller ..................................................................................................................................... 37
Functional Overview: Power ......................................................................................................................................... 38
Using Internal 1.2V LDO Controller ........................................................................................................................... 38
Using External 1.2V LDO Regulator .......................................................................................................................... 39
Functional Overview: Power Management ................................................................................................................... 40
Normal Operation Mode ............................................................................................................................................ 40
Energy Detect Mode .................................................................................................................................................. 40
Soft Power Down Mode ............................................................................................................................................. 41
Power Saving Mode................................................................................................................................................... 41
Port-based Power Down Mode.................................................................................................................................. 41
Functional Overview: Switch Core ................................................................................................................................ 41
Address Look-Up ....................................................................................................................................................... 41
Learning ..................................................................................................................................................................... 41
April 28, 2014
4
Revision-1.1
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