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→Ethernet 10/100
This section provides guidelines for the most used interfaces on DAVE's SOMs module. <br/>
Please refer to SOM's detailed pages for specific additional information.
=== Ethernet 10/100 /1000 ===
====Case #1: PHY is integrated on SOM====
This section refers to the case of PHY integrated on SOM such as [[Lizard SOM|Lizard]] and [[Maya SOM|Maya]].
** Connect connector shield to an adeguate GND or shield Plane
===== PCB =====
'''Refer to this table for 10/100 differential pairs routing'''<br/>
{| {{table border=1}}
| align="center" style="background:#f0f0f0;"|'''Parameterfor 10/100 differential pair'''
| align="center" style="background:#f0f0f0;"|'''Min'''
| align="center" style="background:#f0f0f0;"|'''Typ'''
| Gap than other signals ||2xgap||4xgap||-
|-
| Intra pair matching(mils)*||0||50||240
|-
| TX and RX via mismatch||0||0||1
|-
|}
'''Refer to this table for Gigabit differential pairs routing''' <br/>
{| {{table border=1}}
| align="center" style="background:#f0f0f0;"|'''Parameter for Gigabit Differential Pairs'''
| align="center" style="background:#f0f0f0;"|'''Min'''
| align="center" style="background:#f0f0f0;"|'''Typ'''
| align="center" style="background:#f0f0f0;"|'''Max'''
|-
| Differential Impedance(ohm)||-||100||-
|-
| Common Mode Impedance||-||50||-
|-
| Gap than TX and RX signals ||2xgap||2xgap||-
|-
| Gap than other signals ||2xgap||4xgap||-
|-
| Intra pair matching(mils)*||0||10||10
|-
| Max PCB trace length ||3"||5"||-
|-
|}
<br/>
<nowiki>*</nowiki> Intrapair matching is not mandatory but recommended.
* If LAN connector with integrated magnetic is used:
** do not route traces under the connettor, neither on opposite side
