Datasheet

Micrel, Inc.
KSZ8081MNX/KSZ8081RNB
August
19, 2015 7
Revision 1.4
List of Tables
Table 1. MII Signal Definition ................................................................................................................................................ 22
Table 2. RMII Signal Defintion .............................................................................................................................................. 25
Table 3. MII Signal Connection for MII Back-to-Back Mode (100Base-TX Copper Repeater) ............................................. 28
Table 4. RMII Signal Connection for RMII Back-to-Back Mode (100Base-TX Copper Repeater) ....................................... 29
Table 5. MII Management Frame Format for the KSZ8081MNX/RNB ................................................................................. 30
Table 6. MDI/MDI-X Pin Definition ........................................................................................................................................ 30
Table 7. NAND Tree Test Pin Order for KSZ8081MNX ........................................................................................................ 35
Table 8. NAND Tree Test Pin Order for KSZ8081RNB ........................................................................................................ 36
Table 9. KSZ8081MNX/RNB Power Pin Descriptions .......................................................................................................... 38
Table 10. Typical Current/Power Consumption (VDDA_3.3 = 3.3V, VDDIO = 3.3V) ........................................................... 39
Table 11. Typical Current/Power Consumption (VDDA_3.3 = 3.3V, VDDIO = 2.5V) ........................................................... 39
Table 12. Typical Current/Power Consumption (VDDA_3.3 = 3.3V, VDDIO = 1.8V) ........................................................... 40
Table 13. MII SQE Timing (10Base-T) Parameters .............................................................................................................. 54
Table 14. MII Transmit Timing (10Base-T) Parameters........................................................................................................ 55
Table 15. MII Receive Timing (10Base-T) Parameters......................................................................................................... 56
Table 16. MII Transmit Timing (100Base-TX) Parameters ................................................................................................... 57
Table 17. MII Receive Timing (100Base-TX) Parameters .................................................................................................... 58
Table 18. RMII Timing Parameters – KSZ8081RNB (25MHz input to XI pin, 50MHz output from REF_CLK pin) .............. 59
Table 19. RMII Timing Parameters – KSZ8081RNB (50MHz input to XI pin) ...................................................................... 59
Table 20. Auto-Negotiation Fast Link Pulse (FLP) Timing Parameters ................................................................................ 60
Table 21. MDC/MDIO Timing Parameters ............................................................................................................................ 61
Table 22. Power-up/Reset Timing Parameters ..................................................................................................................... 62
Table 23. 25MHz Crystal/Reference Clock Selection Criteria .............................................................................................. 65
Table 24. 50MHz Oscillator/Reference Clock Selection Criteria .......................................................................................... 65
Table 25. Magnetics Selection Criteria ................................................................................................................................. 67
Table 26. Compatible Single-Port 10/100 Magnetics............................................................................................................ 67