Micrel, Inc.
KSZ8851-16/32 MQL/MQLI
August 2009
4
M9999-083109-2.0
Contents
Pin Configuration for 16-Bit ............................................................................................................................................... 10
Pin Description for 16-Bit ................................................................................................................................................... 11
Pin Configuration for 32-Bit ............................................................................................................................................... 16
Pin Description for 32-Bit ................................................................................................................................................... 17
Strapping Options ............................................................................................................................................................... 21
Functional Description ....................................................................................................................................................... 22
Functional Overview ........................................................................................................................................................... 22
Power Management........................................................................................................................................................ 22
Normal Operation Mode ................................................................................................................................................. 22
Energy Detect Mode ....................................................................................................................................................... 22
Soft Power Down Mode .................................................................................................................................................. 23
Power Saving Mode........................................................................................................................................................ 23
Power Down ................................................................................................................................................................... 23
Wake-on-LAN....................................................................................................................................................................... 23
Detection of Energy ........................................................................................................................................................ 23
Detection of Linkup ......................................................................................................................................................... 24
Wake-up Packet ............................................................................................................................................................. 24
Magic Packet............................................................................................................................................................... 24
Physical Layer Transceiver (PHY) ..................................................................................................................................... 24
100BASE-TX Transmit ................................................................................................................................................... 24
100BASE-TX Receive .................................................................................................................................................... 25
PLL Clock Synthesizer (Recovery)................................................................................................................................. 25
Scrambler/De-scrambler (100BASE-TX only) ................................................................................................................ 25
10BASE-T Transmit........................................................................................................................................................ 25
10BASE-T Receive......................................................................................................................................................... 25
MDI/MDI-X Auto Crossover ............................................................................................................................................ 25
Straight Cable .......................................................................................................................................................... 26
Crossover Cable ...................................................................................................................................................... 26
Auto Negotiation ............................................................................................................................................................. 27
LinkMD
Cable Diagnostics............................................................................................................................................ 28
Access...................................................................................................................................................................... 28
Usage ....................................................................................................................................................................... 28
Media Access Control (MAC) Operation ........................................................................................................................... 29
Inter Packet Gap (IPG) ................................................................................................................................................... 29
Back-Off Algorithm.......................................................................................................................................................... 29
Late Collision .................................................................................................................................................................. 29
Flow Control.................................................................................................................................................................... 29
Half-Duplex Backpressure .............................................................................................................................................. 29
Address Filtering Function .............................................................................................................................................. 30
Clock Generator.............................................................................................................................................................. 31
Bus Interface Unit (BIU)...................................................................................................................................................... 31
Supported Transfers ....................................................................................................................................................... 31
Physical Data Bus Size .................................................................................................................................................. 31
Little and Big Endian Support ......................................................................................................................................... 32
Asynchronous Interface .................................................................................................................................................. 32
BIU Summation............................................................................................................................................................... 32
Queue Management Unit (QMU) ........................................................................................................................................ 33