W3150 Datasheet, PDF (34/59 Pages) List of Unclassifed Manufacturers – WIZnet’s Online Technical Support

5.2.1.1. SERVER mode
Socket Initialization
It initializes the socket as TCP,
1. It sets protocol field of Socket n Mode Register (Sn_MR) as TCP (0x01).
2. It sets user defined value at the Socket n Source Port Register (Sn_PORT).
3. Set the OPEN value to Socket n Command Register (Sn_CR).
4. Check if the value of Socket n Socket Status Register(Sn_SSR) is SOCK_INIT or not. If not, Set the
CLOSE value to Socket n Command Register (Sn_CR), and try from the first.
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