W5200 datasheet(31/88 Pages) WIZNET

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performed.

For SOCKETn close without disconnection-process, CLOSE

command should be just performed.

0x22

SOCK_UDP

It is the status that SOCKETn is open as UDP mode. It is

changed to SOCK_UDP when Sn_MR(P3:P0) is Sn_MR_UDP

and OPEN command is performed. DATA packet can be

transferred without connection that is necessary to TCP

mode SOCKET.

0x32

SOCK_IPRAW

The socket is opened in IPRAW mode. The SOCKET status is

change

SOCK_IPRAW

when

Sn_MR

(P3:P0)

Sn_MR_IPRAW and OPEN command is used. IP Packet can

be transferred without a connection similar to the UDP

mode.

0x42

SOCK_MACRAW

It is changed to SOCK_MACRAW in case of S0_CR=OPEN and

S0_MR (P3:P0)=S0_MR_MACRAW. MACRAW packet (Ethernet

frame) can be transferred similar to UDP mode.

0x5F

SOCK_PPPOE

It is the status that SOCKET0 is open as PPPoE mode. It is

changed to SOCK_PPPoE in case of S0_CR=OPEN and S0_MR

(P3:P0)=S0_MR_PPPoE . It is temporarily used at the PPPoE

connection.

Below is shown during changing the status.

Value

Symbol

Description

0x15

SOCK_SYNSENT

This status indicates that a connect-request (SYN packet)

is sent to a "TCP SERVER". This status shows changing

process from SOCK_INIT to SOCK_ESTABLISHED by CONNECT

command. At this status, if connect-accept (SYN/ACK

packet) is received from "TCP SERVER", it is automatically

changed to SOCK_ ESTBLISHED. If SYN/ACK packet is not

received from the "TCP SERVER" before TCPTO occurs

(Sn_IR(TIMEOUT)=‘1’), it is changed to SOCK_CLOSED.

0x16

SOCK_SYNRECV

This status indicate that a connect-request(SYN packet) is

received from a "TCP CLIENT". It is automatically changed

to SOCK_ESTABLISHED when W5200 successfully transmits

connect-accept (SYN/ACK packet) to the "TCP CLIENT". If

it is failed, TCPTO occurs (Sn_IR(TIMEOUT)=‘1’), and it is

changed to SOCK_CLOSED

0x18

SOCK_FIN_WAIT

These status shows that Socket n is closed. It is observed

in the disconnect-process of active close or passive close.

0x1A

SOCK_CLOSING

W5200 Datasheet(PDF) 31 Page - WIZnet Co., Ltd

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