Micrel, Inc.

KSZ9031RNX

October 2012

5

M9999-103112-1.0

LED Mode ............................................................................................................................................................................. 28

Single-LED Mode ................................................................................................................................................................................ 28

Tri-color Dual-LED Mode ..................................................................................................................................................................... 28

Loopback Mode..................................................................................................................................................................... 29

Local (Digital) Loopback ...................................................................................................................................................................... 29

Remote (Analog) Loopback ................................................................................................................................................................. 30

LinkMD

® Cable Diagnostic .................................................................................................................................................... 31

NAND Tree Support .............................................................................................................................................................. 31

Power Management .............................................................................................................................................................. 32

Energy-Detect Power-Down Mode ...................................................................................................................................................... 32

Software Power-Down Mode ............................................................................................................................................................... 32

Chip Power-Down Mode...................................................................................................................................................................... 32

Energy Efficient Ethernet (EEE)............................................................................................................................................ 32

Transmit Direction Control (MAC-to-PHY) ........................................................................................................................................... 33

Receive Direction Control (PHY-to-MAC) ............................................................................................................................................ 34

Registers Associated with EEE ........................................................................................................................................................... 36

Wake-On-LAN ....................................................................................................................................................................... 36

Magic-Packet Detection....................................................................................................................................................................... 36

Customized-Packet Detection ............................................................................................................................................................. 36

Link Status Change Detection ............................................................................................................................................................. 37

Typical Current/Power Consumption .................................................................................................................................... 38

Transceiver (3.3V), Digital I/Os (3.3V)................................................................................................................................................. 38

Transceiver (3.3V), Digital I/Os (1.8V)................................................................................................................................................. 38

Transceiver (2.5V), Digital I/Os (2.5V)................................................................................................................................................. 39

Transceiver (2.5V), Digital I/Os (1.8V)................................................................................................................................................. 39

Register Map ......................................................................................................................................................................... 40

Standard Registers ............................................................................................................................................................... 42

IEEE Defined Registers – Descriptions ............................................................................................................................................... 42

Vendor-Specific Registers – Descriptions ........................................................................................................................................... 48

MMD Registers...................................................................................................................................................................... 52

MMD Registers – Descriptions ............................................................................................................................................................ 53

Absolute Maximum Ratings

(1)................................................................................................................................................ 62

Operating Ratings

(2) .............................................................................................................................................................. 62

Electrical Characteristics

(3) .................................................................................................................................................... 62

Timing Diagrams ................................................................................................................................................................... 65

RGMII Timing ...................................................................................................................................................................................... 65

Auto-Negotiation Timing ...................................................................................................................................................................... 66

MDC/MDIO Timing .............................................................................................................................................................................. 67

Power-Up/Power-Down/Reset Timing ................................................................................................................................................. 68

Reset Circuit.......................................................................................................................................................................... 69

Reference Circuits – LED Strap-In Pins................................................................................................................................ 70

Reference Clock – Connection and Selection ...................................................................................................................... 71

Magnetic – Connection and Selection .................................................................................................................................. 72