
Micrel, Inc.
KSZ8851-16MLLJ
March 2010
4
M9999-030210-1.0
Contents
General Description .............................................................................................................................................................. 1
Functional Diagram............................................................................................................................................................... 1
Features ................................................................................................................................................................................. 2
Power Modes, Power Supplies, and Packaging............................................................................................................. 2
Additional Features............................................................................................................................................................... 2
Network Features .................................................................................................................................................................. 2
Applications........................................................................................................................................................................... 2
Markets................................................................................................................................................................................... 2
Ordering Information ............................................................................................................................................................ 3
Revision History .................................................................................................................................................................... 3
Contents................................................................................................................................................................................. 4
List of Figures........................................................................................................................................................................ 9
List of Tables ....................................................................................................................................................................... 10
Pin Configuration ................................................................................................................................................................ 11
Pin Description .................................................................................................................................................................... 12
Strapping Options ............................................................................................................................................................... 15
Functional Description ....................................................................................................................................................... 16
Functional Overview ........................................................................................................................................................... 16
Power Management ..................................................................................................................................................... 16
Rx unused block disabled ........................................................................................................................................ 16
Normal Operation Mode ............................................................................................................................................... 16
Energy Detect Mode ..................................................................................................................................................... 16
Soft Power Down Mode ................................................................................................................................................ 17
Power Saving Mode ..................................................................................................................................................... 17
Wake-on-LAN ............................................................................................................................................................... 17
Detection of Energy ...................................................................................................................................................... 17
Detection of Linkup ....................................................................................................................................................... 17
Wake-Up Packet........................................................................................................................................................... 18
Magic Packet ............................................................................................................................................................ 18
Physical Layer Transceiver (PHY) ..................................................................................................................................... 19
100BASE-TX Transmit ................................................................................................................................................. 19
100BASE-TX Receive .................................................................................................................................................. 19
PLL Clock Synthesizer (Recovery)............................................................................................................................... 19
Scrambler/De-Scrambler (100BASE-TX Only)............................................................................................................. 19
10BASE-T Transmit...................................................................................................................................................... 19
10BASE-T Receive....................................................................................................................................................... 20
MDI/MDI-X Auto Crossover .......................................................................................................................................... 20
Straight Cable .......................................................................................................................................................... 20
Crossover Cable ...................................................................................................................................................... 21
Auto Negotiation ........................................................................................................................................................... 21