Related Manuals for Davicom DM9163
Summary of Contents for Davicom DM9163
- Page 1 DM9163 Layout Guide DM9163 Layout Guide Version: 1.0 Technical Reference Manual Davicom Semiconductor, Inc May 5, 2014 Version: DM9163-LG-V10 May 5, 2014...
- Page 2 Layout Guide 1. Placement, Signal and Trace Routing • Place the 10/100M magnetic as close as possible to the DM9163 (no more than 20mm) and to the RJ-45 connector. • Place the termination resistors 50Ω as close as possible to the 10/100M magnetic and the DM9163 RX±...
- Page 3 (no less than 3mm). It’s better to place ground plane between these two pairs of traces. • Do not route any digital signal between the DM9163 RX± and TX± pairs to the RJ-45. Keep the two pairs away from all the other active signals and the chassis ground.
- Page 4 10Base-T/100Base-TX Application Figure 1-1 and 1-2 illustrate the two types of the specific transformer interconnects and how to connect with Davicom DM9163. These two transformers are not pin-to-pin compatible and must be considered when using the DM9163 in auto-MDIX mode.
- Page 5 The 0.1-0.01μF decoupling capacitor should be connected between each DVDD/DGND set and AVDD/AGND set and be placed as close as possible to the power pins of DM9163. The conservative approach is to use two decoupling capacitors on each DVDD/DGND set and AVDD/AGND set. One 0.1μF is for low frequency noise, and the other 0.01μF is for high frequency noise on the power supply.
- Page 6 (see Figure 3-2). DM9163 Figure 3-1 Analog ground domain Analog ground domain AGND AGND AGND AGND AGND AGND Worse! AGND direct short Good Digital ground domain Digital ground domain Figure 3-2 Figure 3-3 Version: DM9163-LG-V10 May 5, 2014...
- Page 7 Panasonic surface mound bead, part number EXCCL4532U or an equivalent. A 10μF, 0.1μF and 0.01μF electrolytic bypass capacitors should be connected between VDD and GND at the device side of each of the ferrite bead. • Should separate analog power planes from noisy logic power planes. DM9163 Figure 4 Version: DM9163-LG-V10 May 5, 2014...
- Page 8 ( Min ) 60 – 80 MHz Differential common dB ( Min ) 1 – 60 MHz mode rejection dB ( Min ) 60 – 100 MHz Transformer isolation 1500 Table 5-2: Magnetic Specification Requirements Version: DM9163-LG-V10 May 5, 2014...
- Page 9 Equivalent Series Resistance 25 ohms max Load Capacitance 22 pF typ. Case Capacitance 7 pF max. Power Dissipation 1mW max. Table 6-1: Crystal Specifications 25 M 22pf 22pf AGND AGND Figure 6 Crystal Circuit Diagram Version: DM9163-LG-V10 May 5, 2014...
- Page 10 The length of the trace routing for the Media Independent Interface (MII) signals should be as short and direct as possible between the DM9163 and MAC controller (Maximum length to be shorter than 20cm). These MII signals are as follows,...
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