DM9621 datasheet(5/66 Pages) DAVICOM

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DM9621

USB2.0 to Fast Ethernet Controller

Preliminary

Version: DM9621 -14-DS-P02

February 23, 2011

7.2.24 Auto-Negotiation (continued)........................................................................ 53

8. DC and AC Electrical Characteristics ................................................................................ 54

8.1 Absolute Maximum Ratings ( 25

°C )......................................................................... 54

8.1.1 Operating Conditions...................................................................................... 54

8.2 DC Electrical Characteristics (VDD = 3.3V).............................................................. 55

8.3 AC Electrical Characteristics & Timing Waveforms .................................................. 55

8.3.1 TP Interface.................................................................................................... 55

8.3.2 Oscillator/Crystal Timing................................................................................. 56

9. AC Timing waveform: ........................................................................................................ 57

9.1 Power On Reset Timing............................................................................................ 57

9.2 EEPROM timing ....................................................................................................... 58

9.3 RMII TX timing.......................................................................................................... 59

9.4 RMII RX timing ......................................................................................................... 59

10. Magnetic and Crystal Selection Guide............................................................................. 60

10.1 Magnetic Selection Guide....................................................................................... 60

10.2 Crystal Selection Guide .......................................................................................... 60

11. Application Circuit ............................................................................................................ 62

12. Package Information........................................................................................................ 65

13. Ordering Information........................................................................................................ 66

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