KSZ8895RQTR Ver la hoja de datos (PDF) - Micrel
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KSZ8895RQTR Datasheet PDF : 120 Pages
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Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Contents
System Level Applications...........................................................................................................................................13
Pin Configuration ..........................................................................................................................................................15
Pin Description ..............................................................................................................................................................16
Pin for Strap-In Options................................................................................................................................................23
Introduction ...................................................................................................................................................................26
Functional Overview: Physical Layer Transceiver ....................................................................................................26
100BASE-TX Transmit ...............................................................................................................................................26
100BASE-TX Receive ................................................................................................................................................26
PLL Clock Synthesizer................................................................................................................................................27
Scrambler/Descrambler (100BASE-TX only) .............................................................................................................27
100BASE-FX Operation..............................................................................................................................................27
100BASE-FX Signal Detection ...................................................................................................................................27
100BASE-FX Far End Fault........................................................................................................................................27
10BASE-T Transmit....................................................................................................................................................27
10BASE-T Receive .....................................................................................................................................................27
MDI/MDI-X Auto Crossover ........................................................................................................................................27
Straight Cable .........................................................................................................................................................28
Crossover Cable .....................................................................................................................................................29
Auto-Negotiation .........................................................................................................................................................29
On-Chip Termination Resistors ..................................................................................................................................31
Internal 1.2V LDO Controller ......................................................................................................................................31
Functional Overview: Power Management .................................................................................................................31
Normal Operation Mode .............................................................................................................................................31
Energy Detect Mode ...................................................................................................................................................32
Soft Power Down Mode ..............................................................................................................................................32
Power Saving Mode....................................................................................................................................................32
Port-based Power Down Mode...................................................................................................................................32
Functional Overview: Switch Core ..............................................................................................................................33
Address Look-Up ........................................................................................................................................................33
Learning ......................................................................................................................................................................33
Migration .....................................................................................................................................................................33
Aging ...........................................................................................................................................................................33
Forwarding ..................................................................................................................................................................33
Switching Engine ........................................................................................................................................................33
Media Access Controller (MAC) Operation ................................................................................................................33
Inter-Packet Gap (IPG) ...........................................................................................................................................34
Backoff Algorithm....................................................................................................................................................34
Late Collision ..........................................................................................................................................................34
Illegal Frames .........................................................................................................................................................34
Flow Control............................................................................................................................................................34
Half-Duplex Back Pressure ....................................................................................................................................37
Broadcast Storm Protection....................................................................................................................................37
MII Interface Operation ...............................................................................................................................................38
March 12, 2014
4
Revision 1.7
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