SQE and Jabber Function (10Base-T only)...................................................................................................................... 12
MII Data Interface ............................................................................................................................................................. 14
MII Signal Definition.......................................................................................................................................................... 15
Receive Data Valid (RXDV).......................................................................................................................................... 16
Receive Data [3:0] (RXD[3:0]) ...................................................................................................................................... 16
Carrier Sense (CRS) .................................................................................................................................................... 16
Reduced MII (RMII) Data Interface................................................................................................................................... 16
RMII Signal Definition ....................................................................................................................................................... 17
HP Auto MDI/MDI-X.......................................................................................................................................................... 18
Power Management.......................................................................................................................................................... 20
Power Saving Mode ..................................................................................................................................................... 20
Power Down Mode ....................................................................................................................................................... 20
Reference Circuit for Power and Ground Connections .................................................................................................... 21
Absolute Maximum Ratings ............................................................................................................................................ 29
Reference Circuits for LED Strapping Pins...................................................................................................................... 41
Selection of Isolation Transformer.................................................................................................................................... 42
Selection of Reference Crystal .......................................................................................................................................... 42
Package Information ........................................................................................................................................................... 43
Figure 4. 25MHz Crystal / Oscillator Reference Clock for MII Mode ................................................................................... 20
Figure 5. 50MHz Oscillator Reference Clock for RMII Mode............................................................................................... 20
Figure 6. KSZ8041NLJ Power and Ground Connections .................................................................................................... 21
Figure 7. MII SQE Timing (10Base-T) ................................................................................................................................. 31
Figure 8. MII Transmit Timing (10Base-T) ........................................................................................................................... 32
Figure 9. MII Receive Timing (10Base-T) ............................................................................................................................ 33
Figure 10. MII Transmit Timing (100Base-TX)..................................................................................................................... 34
Figure 11. MII Receive Timing (100Base-TX)...................................................................................................................... 35
Figure 12. RMII Timing – Data Received from RMII ............................................................................................................ 36
Figure 13. RMII Timing – Data Input to RMII ....................................................................................................................... 36
Figure 14. Auto-Negotiation Fast Link Pulse (FLP) Timing ................................................................................................. 37
Figure 18. Recommended Reset Circuit for interfacing with CPU/FPGA Reset Output...................................................... 40
Figure 19. Reference Circuits for LED Strapping Pins......................................................................................................... 41
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Embedded System
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