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DM9010BEP Datasheet(PDF) 49 Page - Davicom Semiconductor, Inc. |
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DM9010BEP Datasheet(HTML) 49 Page - Davicom Semiconductor, Inc. |
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49 / 62 page ![]() DM9010B Single Chip Ethernet Controller with General Processor Interface Preliminary 49 Version: DM9010B--DS-P01 September 5, 2007 10.3 AC Electrical Characteristics & Timing Waveforms 10.3.1 TP Interface Symbol Parameter Min. Typ. Max. Unit Conditions tTR/F 100TX+/- Differential Rise/Fall Time 3.0 - 5.0 ns tTM 100TX+/- Differential Rise/Fall Time Mismatch 0 - 0.5 ns tTDC 100TX+/- Differential Output Duty Cycle Distortion 0 - 0.5 ns tT/T 100TX+/- Differential Output Peak-to-Peak Jitter 0 - 1.4 ns XOST 100TX+/- Differential Voltage Overshoot 0 - 5 % 10.3.2 Oscillator/Crystal Timing Symbol Parameter Min. Typ. Max. Unit Conditions TCKC TCKC 39.998 40 40.002 ns 50ppm TPWH OSC Pulse Width High 16 20 24 ns TPWL OSC Pulse Width Low 16 20 24 ns 10.3.3 Power On Reset Timing PWRST# Strap pins T2 T1 EECS T3 T4 Symbol Parameter Min. Typ. Max. Unit Conditions T1 PWRST# Low Period 1 - - ms - T2 Strap pin hold time with PWRST# 40 - - ns - T3 PWRST# high to EECS high - 11.31 - us T4 PWRST# high to EECS burst end - -- 3 ms Note: The DM9010B needs the time about 3ms to down load the setting from EEPROM after PWRST# deasserted, During the period, the processor command (IOR#, IOW#, AEN#) pins are not recognized even no EEPROM present. So, please note that processor only access DM9010B after PWRST# deasserted 3ms. |
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