Micrel, Inc.
KSZ8051MNL/RNL
July 2010
5
M9999-070910-1.0
Transmit Enable (TXEN) .............................................................................................................................................. 25
Transmit Data [1:0] (TXD[1:0]) ..................................................................................................................................... 25
Carrier Sense/Receive Data Valid (CRS_DV).............................................................................................................. 25
Receive Data [1:0] (RXD[1:0]) ...................................................................................................................................... 25
Receive Error (RXER) .................................................................................................................................................. 25
Collision Detection........................................................................................................................................................ 25
RMII Signal Diagram......................................................................................................................................................... 25
RMII – 25MHz Clock Mode........................................................................................................................................... 26
RMII – 50MHz Clock Mode........................................................................................................................................... 26
Back-to-Back Mode – 100Mbps Copper Repeater / Media Converter............................................................................ 27
MII Back-to-Back Mode (KSZ8051MNL only)................................................................................................................... 27
RMII Back-to-Back Mode (KSZ8051RNL only) ................................................................................................................ 28
MII Management (MIIM) Interface....................................................................................................................................... 28
Interrupt (INTRP) ................................................................................................................................................................. 29
HP Auto MDI/MDI-X ............................................................................................................................................................. 29
Straight Cable ................................................................................................................................................................... 29
Crossover Cable ............................................................................................................................................................... 30
LinkMD
Cable Diagnostics................................................................................................................................................ 30
NAND Tree Support ............................................................................................................................................................ 30
NAND Tree I/O Testing..................................................................................................................................................... 32
Power Management ............................................................................................................................................................ 32
Power Saving Mode.......................................................................................................................................................... 32
Energy Detect Power Down Mode ................................................................................................................................... 32
Power Down Mode ........................................................................................................................................................... 32
Slow Oscillator Mode ........................................................................................................................................................ 32
Reference Circuit for Power and Ground Connections .................................................................................................. 33
Register Map........................................................................................................................................................................ 34
Register Description ........................................................................................................................................................... 34
Register Description (Continued)...................................................................................................................................... 35
Register Description (Continued)...................................................................................................................................... 36
Register Description (Continued)...................................................................................................................................... 37
Register Description (Continued)...................................................................................................................................... 38
Register Description (Continued)...................................................................................................................................... 39
Register Description (Continued)...................................................................................................................................... 40
Register Description (Continued)...................................................................................................................................... 41
Register Description (Continued)...................................................................................................................................... 42
Register Description (Continued)...................................................................................................................................... 43
Absolute Maximum Ratings
(1) ............................................................................................................................................ 44
Operating Ratings
(2) ............................................................................................................................................................ 44
Electrical Characteristics
(3) ................................................................................................................................................ 44
Electrical Characteristics
(3) (Continued) ........................................................................................................................... 45
Timing Diagrams ................................................................................................................................................................. 46
MII SQE Timing (10Base-T) ............................................................................................................................................. 46