4.2.3 Ethernet
The ATSAM4E16E has a built in 10/100Mbps Ethernet IEEE® 802.3 MAC with an MII interface. SAM4E Xplained Pro connects the MAC to a Micrel KSZ8081MNXIA physical-layer transceiver, which is connected to one RJ45 Ethernet connector.
Every SAM4E Xplained Pro kit is assigned a unique MAC48 address that can be used in an application. This address is printed on the label on the bottom side of the kit and stored in the EDBG. For more information, see Identifying Product ID and Revision and Kit Specific Data.
Table 4-8 lists all I/O-lines connected to the Ethernet PHY.
| SAM4E pin | Function | Ethernet function | Shared functionality |
|---|---|---|---|
| PD0 | GTXCK | TXC | |
| PD1 | GTXEN | TXEN | |
| PD2 | GTX0 | TXD0 | |
| PD3 | GTX1 | TXD1 | |
| PD4 | GRXDV | RXDV/CONFIG2 | |
| PD5 | GRX0 | RXD0/DUPLEX | |
| PD6 | GRX1 | RXD1/PHYAD2 | |
| PD7 | GRXER | RXER/ISO | |
| PD8 | GMDC | MDC | |
| PD9 | GMDIO | MDIO | |
| PD10 | GCRS | CRS/CONFIG1 | |
| PD11 | GRX2 | RXD2/PHYAD1 | |
| PD12 | GRX3 | RXD3/PHYAD0 | |
| PD13 | GCOL | COL/CONFIG0 | |
| PD14 | GRXCK | RXC/B-CAST_OFF | |
| PD15 | GTX2 | TXD2 | |
| PD16 | GTX3 | TXD3 | |
| PD29 | GPIO | INTRP/#NAND_TREE | EXT2 GPIO |
| PD31 | GPIO | #RST |