88e3016 Marvell Semiconductor, Inc., 88e3016 Datasheet - Page 42

• Manufacturer Part Number: 88e3016
• Description: Integrated 10/100 Fast Ethernet Transceiver
• Manufacturer: Marvell Semiconductor, Inc.

Figure 9: NMOS Output Impedance (1.8V, 2.5V) Trend Lines
Example: The automatic calibration has a 50 ohm target, but if the trace impedance on board was 60 ohms, you
see reflections from a scope capture taken at the destination. Refer to
that the reflections are eliminated as in
Figure 10: Signal Reflections, using the 50 ohm Setting, 60 ohm line
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Integrated 10/100 Fast Ethernet Transceiver
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Figure
2.5V
3.3V
NMOS Register Value Decimal
CONFIDENTIAL
11.
Figure
10. After manual calibration, you see
Copyright © 2006 Marvell
May 4, 2006, Advance