Micrel, Inc.
KSZ9021GN
Absolute Maximum Ratings ............................................................................................................................................ 41
Operating Ratings ............................................................................................................................................................ 41
Electrical Characteristics ................................................................................................................................................ 41
Timing Diagrams .............................................................................................................................................................. 44
GMII Transmit Timing .................................................................................................................................................... 44
GMII Receive Timing ..................................................................................................................................................... 45
MII Transmit Timing ....................................................................................................................................................... 46
MII Receive Timing ........................................................................................................................................................ 47
Auto-Negotiation Timing ................................................................................................................................................ 48
MDC/MDIO Timing ........................................................................................................................................................ 49
Reset Timing.................................................................................................................................................................. 50
Reset Circuit ..................................................................................................................................................................... 50
Reference Circuits – LED Strap-in Pins......................................................................................................................... 51
Reference Clock – Connection and Selection............................................................................................................... 52
Magnetics Specification .................................................................................................................................................. 52
Package Information ........................................................................................................................................................ 53
September 2010
5
M9999-091010-1.1