Datasheet

Micrel, Inc.
KSZ8081MNX/KSZ8081RNB
August
19, 2015 5
Revision 1.4
NAND Tree Support .............................................................................................................................................................. 35
NAND Tree I/O Testing ..................................................................................................................................................... 36
Power Management .............................................................................................................................................................. 37
Power-Saving Mode .......................................................................................................................................................... 37
Energy-Detect Power-Down Mode .................................................................................................................................... 37
Power-Down Mode ............................................................................................................................................................ 37
Slow-Oscillator Mode ......................................................................................................................................................... 37
Reference Circuit for Power and Ground Connections ......................................................................................................... 38
Typical Current/Power Consumption .................................................................................................................................... 39
Transceiver (3.3V), Digital I/Os (3.3V) .............................................................................................................................. 39
Transceiver (3.3V), Digital I/Os (2.5V) .............................................................................................................................. 39
Transceiver (3.3V), Digital I/Os (1.8V) .............................................................................................................................. 40
Register Map ......................................................................................................................................................................... 41
Register Description .............................................................................................................................................................. 42
Absolute Maximum Ratings .................................................................................................................................................. 52
Operating Ratings ................................................................................................................................................................. 52
Electrical Characteristics ....................................................................................................................................................... 52
Timing Diagrams ................................................................................................................................................................... 54
MII SQE Timing (10Base-T) .............................................................................................................................................. 54
MII Transmit Timing (10Base-T) ........................................................................................................................................ 55
MII Receive Timing (10Base-T) ......................................................................................................................................... 56
MII Transmit Timing (100Base-TX) ................................................................................................................................... 57
MII Receive Timing (100Base-TX) .................................................................................................................................... 58
RMII Timing ....................................................................................................................................................................... 59
Auto-Negotiation Timing .................................................................................................................................................... 60
MDC/MDIO Timing ............................................................................................................................................................ 61
Power-up/Reset Timing ..................................................................................................................................................... 62
Reset Circuit .......................................................................................................................................................................... 63
Reference Circuits – LED Strap-In Pins ................................................................................................................................ 64
Reference Clock – Connection and Selection ...................................................................................................................... 65
Magnetic – Connection and Selection .................................................................................................................................. 66
Package Information and Recommended Land Pattern ....................................................................................................... 68