Micrel, Inc.
KSZ9021RL/RN
Power Saving Mode.......................................................................................................................................................... 33
Software Power Down Mode............................................................................................................................................ 33
Chip Power Down Mode................................................................................................................................................... 33
Register Map........................................................................................................................................................................33
Register Description...........................................................................................................................................................34
IEEE Defined Registers.................................................................................................................................................... 34
Vendor Specific Registers ................................................................................................................................................ 41
Extended Registers .......................................................................................................................................................... 44
Absolute Maximum Ratings...............................................................................................................................................46
Operating Ratings...............................................................................................................................................................46
Electrical Characteristic .....................................................................................................................................................46
Timing Diagrams.................................................................................................................................................................48
RGMII Timing.................................................................................................................................................................... 48
Auto-Negotiation Timing ................................................................................................................................................... 49
MDC/MDIO Timing ........................................................................................................................................................... 50
Reset Timing..................................................................................................................................................................... 51
Reset Circuit ........................................................................................................................................................................51
Reference Circuits – LED Strap-in Pins............................................................................................................................52
Reference Clock – Connection and Selection..................................................................................................................53
Magnetics Specification .....................................................................................................................................................53
Package Information...........................................................................................................................................................54
M9999-101309-1.1
October 2009
5
MICREL [ MICREL SEMICONDUCTOR ]
