3.2.7.1 Ethernet 10/100 (GMAC) Port
The on-board SOM integrates a 10/100 Mbps Ethernet controller (KSZ8081RNA) allowing direct connection to any 10/100 Mbps Ethernet-based Local Area Network, for full interaction with local servers and wide area networks such as the Internet.
ETH signals from the SOM are connected to a RJ45 MagJack. Additionally, for monitoring and control purposes, a LED functionality is carried on the RJ45 connector to indicate link status.
The table below describes the pin assignment of Ethernet connector J15.
| Pin No | Mnemonic | Signal Description |
|---|---|---|
| 1 | TX+ | Transmit positive differential pair |
| 2 | TX- | Transmit negative differential pair |
| 3 | RX+ | Receive positive differential pair |
| 4 | Decoupling capacitor | – |
| 5 | Decoupling capacitor | – |
| 6 | RX- | Receive negative differential pair |
| 7 | NC | – |
| 8 | EARTH / GND | Common ground |
| 9 | ACT LED (A) | LED activity (not used) |
| 10 | ACT LED (K) | LED activity (not used) |
| 11 | LINK LED (K) | LED link connection |
| 12 | LINK LED (A) | LED link connection |
| 13 | EARTH / GND | Common ground |
| 14 | EARTH / GND | Common ground |
| 15 | NC | – |
| 16 | NC | – |