I found ENC28J60 Ethernet PHY chip.
The specifications say that the Physical Network Type is '10BASE-T
' on the one hand, but on the other hand the data rate is '10 Mbit/s, 100 Mbit/s, 1000 Mbit/s
'.
As far as I know, a 10BASE-T chip can not support a data rate of 1Gbit/s !
Moreover, the 10BASE-T doesn't support Full-duplex, but the specifications say that the Communication Mode is 'Full Duplex, Half Duplex
'.
Please help me solve this contradiction.
Best Answer
From the datasheet
So, it is 10mbps FD (and yes, 10baseT supports full duplex, at least some cards do) and, as all 10baseT devices is compatible with newer networks.