ksz8021rnli Micrel Semiconductor, ksz8021rnli Datasheet - Page 6

• Manufacturer Part Number: ksz8021rnli
• Description: 10base-t/100base-tx Phy With Rmii Support
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
KSZ8021RNL / KSZ8031RNL
List of Figures
Figure 1. Auto-Negotiation Flow Chart................................................................................................................................. 14
Figure 2. KSZ8021/31RNL RMII Interface (RMII – 25MHz Clock Mode) ............................................................................ 16
Figure 3. KSZ8021/31RNL RMII Interface (RMII – 50MHz Clock Mode) ............................................................................ 17
Figure 4. KSZ8021/31RNL and KSZ8041FTL RMII Back-to-Back Media Converter .......................................................... 18
Figure 5. Typical Straight Cable Connection ....................................................................................................................... 20
Figure 6. Typical Crossover Cable Connection ................................................................................................................... 20
Figure 7. KSZ8021/31RNL Power and Ground Connections .............................................................................................. 23
Figure 8. RMII Timing – Data Received from RMII .............................................................................................................. 35
Figure 9. RMII Timing – Data Input to RMII ......................................................................................................................... 35
Figure 10. Auto-Negotiation Fast Link Pulse (FLP) Timing ................................................................................................. 36
Figure 11. MDC/MDIO Timing.............................................................................................................................................. 37
Figure 12. Reset Timing....................................................................................................................................................... 38
Figure 13. Recommended Reset Circuit.............................................................................................................................. 39
Figure 14. Recommended Reset Circuit for interfacing with CPU/FPGA Reset Output...................................................... 39
Figure 15. Reference Circuits for LED Strapping Pin .......................................................................................................... 40
Figure 16. 25MHz Crystal / Oscillator Reference Clock Connection ................................................................................... 41
Figure 17. 50MHz Oscillator Reference Clock Connection ................................................................................................. 42
August 2010
6
M9999-082710-1.0