W3150 Datasheet, PDF (45/59 Pages) List of Unclassifed Manufacturers – WIZnet’s Online Technical Support

5.3. Usage of PPPoE environment
As like ADSL, at the PPPoE, communication is available after acquiring the network information by
connection with PPPoE SERVER. In this case, user doesn’t need to assign the value of GAR, SUBR, and
IPR. For more details, refer to follows. PPPoE(RFC 2516),PAP mechanism(RFC 1334), CHAP
mechanism(RFC 1994).
Socket Initialization
Initialize the socket as PPPoE and try the connection to PPPoE SERVER.
1. Set the PPPoE bit of Mode Register(MR) as 1.
2. Set the protocol field of Socket 0 Mode Register(S0_MR) as PPPoE(0x05). Be sure to use Socket
0. Other sockets are not supported.
3. Write 0XFF on the Socket 0 Destination Hardware Address Register(S0_DHAR).
4. Give OPEN command to Socket 0 Command Register(S0_CR).
5. For the connection with PPPoE SERVER, give CONNECT command to the Socket 0 Command
Register(S0_CR).
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