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CORE9G25 needs just 5 wires to have a working 10/100 MBit LAN port and a RJ45 ethernet connector (with embedded line tranformers).
These are the lines used:
| Board pins | Ethernet connector pins |
|---|---|
| W2 (ETH RX+) | 3 (TX+) |
| W3 (ETH RX-) | 6 (TX+) |
| W4 (ETH TX+) | 1 (RX+) |
| W5 (ETH TX-) | 2 (RX-) |
| W6 (ETH 3V3) | 4 (RCT) and 5 (TCT) |
Do not use simple LAN connectors without the embedded line transformers.
Ethernet state leds
Other 3 wires are required to have the link-up and traffic leds working. On this scheme is illustrated how to wire the leds integrated in our LAN connector but it is possible to use also two simple leds (no resistors are required).
These are the lines used:
| pins | Ethernet connector pins |
|---|---|
| W8 (ETH green link led) | 9 (Green led anode) |
| W7 (ETH yellow traffic led) | 12 (Yellow led anode) |
| W1 (GND) | 10 (Green led cathode) and 11 (Yellow led cathode) |
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