Micrel
KSZ8001
June 2009
Revision 1.04
4
Table of Contents
Pin Description .................................................................................................................................................................................... 6
Strapping Options ............................................................................................................................................................................. 10
Pin Configuration .............................................................................................................................................................................. 11
Functional Description...................................................................................................................................................................... 12
100BASE-TX Transmit .................................................................................................................................................................... 12
100BASE-TX Receive ..................................................................................................................................................................... 12
PLL Clock Synthesizer .................................................................................................................................................................... 12
Scrambler/De-scrambler (100BASE-TX only).................................................................................................................................. 12
10BASE-T Transmit......................................................................................................................................................................... 12
10BASE-T Receive.......................................................................................................................................................................... 12
SQE and Jabber Function (10BASE-T only).................................................................................................................................... 13
Auto-Negotiation.............................................................................................................................................................................. 13
MII Management Interface................................................................................................................................................................. 13
MII Data Interface ............................................................................................................................................................................ 13
RMII (Reduced MII) Data Interface.................................................................................................................................................... 14
RMII Signal Definition ...................................................................................................................................................................... 14
Reference Clock (REF_CLK)........................................................................................................................................................... 15
Carrier Sense/Receive Data Valid (CRS_DV) ................................................................................................................................. 15
Receive Data [1:0] (RXD[1:0]) ......................................................................................................................................................... 15
Transmit Enable (TX_EN) ............................................................................................................................................................... 15
Transmit Data [1:0] (TXD[1:0])......................................................................................................................................................... 15
Collision Detection........................................................................................................................................................................... 15
RX_ER ............................................................................................................................................................................................ 15
RMII AC Characteristics .................................................................................................................................................................. 16
RMII Transmit Timing ...................................................................................................................................................................... 16
RMII Receive Timing ....................................................................................................................................................................... 16
SMII Signal Definition........................................................................................................................................................................ 17
SMII Signals .................................................................................................................................................................................... 17
Receive Path ................................................................................................................................................................................... 17
Receive Sequence Diagram............................................................................................................................................................ 17
Transmit Path .................................................................................................................................................................................. 18
Transmit Sequence Diagram........................................................................................................................................................... 18
Collision Detection........................................................................................................................................................................... 19
DC Specification .............................................................................................................................................................................. 19
Timing Specification ........................................................................................................................................................................ 20
HP Auto Crossover (Auto MDI/MDI-X) ............................................................................................................................................. 21
Auto MDI/MDI-X Cross-Over Transformer Connection.................................................................................................................... 22
Power Management........................................................................................................................................................................... 22
100BASE-FX Mode ............................................................................................................................................................................ 22
Media Converter Operation............................................................................................................................................................... 22
LinkMD Cable Diagnostics................................................................................................................................................................ 23
Reference Clock Connection Options ............................................................................................................................................. 24
Circuit Design Reference for Power Supply.................................................................................................................................... 25
Register Map ...................................................................................................................................................................................... 26
Register 0h – Basic Control............................................................................................................................................................. 26
Register 1h – Basic Status .............................................................................................................................................................. 27
Register 2h – PHY Identifier 1 ......................................................................................................................................................... 27
Register 3h – PHY Identifier 2 ......................................................................................................................................................... 27
Register 4h – Auto-Negotiation Advertisement................................................................................................................................ 27