W5300 datasheet(76/128 Pages) WIZNET

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Sn_SSR(0x08208+0x40n/0x208+0x40n)

Sn_SSR0(0x08208+0x40n/0x208+0x40n)

Sn_SSR1(0x08209+0x40n/0x209+0x40n)

Reserved

SOCKET Status

Sn_SSR(15:8)/Sn_SSR0(7:0) : All Reserved

Sn_SSR(7:0)/Sn_SSR1(7:0)

Value

Symbol

Description

0x00

SOCK_CLOSED

It is the status that resource of SOCKETn is released

When DISCON or CLOSE command is performed, or ARPTO,

or TCPTO occurs, it is changed to SOCK_CLOSED regardless

of previous value.

0x13

SOCK_INIT

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

It is changed to SOCK_INIT when Sn_MR(P3:P0) is

Sn_MR_TCP and OPEN command is performed. It is the

initial step of TCP connection establishment.

It is possible to perform LISTEN command at the "TCP

SERVER" mode and CONNECT command at the "TCP

CLIENT".

0x14

SOCK_LISTEN

It is the status that SOCKETn operates as "TCP SERVER"

and waits for connection-request (SYN packet) from "TCP

CLIENT".

When LISTEN command is performed, it is changed to

SOCK_LISTEN.

When connect-request(SYN packet) from "TCP CLIENT" is

successfully processed,

SOCK_LISTEN

changed to

SOCK_ESTABLISHED.

failed,

TCPTO

occurs(Sn_IR(TIME

OUT)=‘1’)

and

changed

SOCK_CLOSED.

0x17

SOCK_ESTABLISHED

It is the status that TCP connection is established.

It is changed to SOCK_ESTABLISHED when SYN packet

from "TCP CLIENT" is successfully processed at the

SOCK_LISTEN, or CONNECT command is successfully

performed. At this status, DATA packet can be transferred,

W5300 Datasheet(PDF) 76 Page - WIZnet Co., Ltd

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