Data Sheet

iEthernet

W5200

5.2.1.1 TCP SERVER

Figure 10 TCP SERVER Operation Flow

SOCKET Initialization

SOCKET initialization is required for TCP data communication. The initialization is

opening the SOCKET. The SOCKET opening process selects one SOCKET from 8 SOCKETS

of the W5200, and sets the protocol mode (Sn_MR) and Sn_PORT0 which is source port

number (Listen port number in “TCP SERVER”) in the selected SOCKET, and then

executes OPEN command. After the OPEN command, if the status of Sn_SR is changed

to SOCK_INIT, the SOCKET initialization process is completed.

The SOCKET initialization process is identically applied in “TCP SERVER” and “TCP

CLIENT.”The Initialization process of Socket n in TCP mode is shown below.