W5300 datasheet(78/128 Pages) WIZNET

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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

It is the status that connect-request(SYN packet) is received

from "TCP CLIENT".

It is automatically changed to SOCK_ESTABLISHED when

W5300 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

It is the status that SOCKETn is closed.

It is observed in the disconnect-process of active close or

passive close. It is changed to SOCK_CLOSED when

disconnect-process is successfully finished or TCPTO occurs

(Sn_IR

(TIMEOUT)=‘1’).

0X1B

SOCK_TIME_WAIT

0X1D

SOCK_LAST_ACK

0x01

SOCK_ARP

It is the status that ARP-request is transmitted in order to

acquire destination hardware address.

This status is observed when SEND command is performed

the

SOCK_UDP

SOCK_IPRAW,

CONNECT

command is performed at the SOCK_INIT.

If hardware address is successfully acquired from destination

(when

ARP-response

received),

changed

SOCK_UDP, SOCK_IPRAW or SOCK_SYNSENT. If it's

failed and ARPTO occurs

(Sn_IR(TIMEOUT)=‘1’), in case of

UDP or IPRAW mode it goes back to the previous status(the

SOCK_UDP or SOCK_IPRAW), in case of TCP mode it goes

to the SOCK_CLOSED.

cf>

ARP-process

operates

the

SOCK_UDP

SOCK_IPRAW when the previous and current values of

W5300 Datasheet(PDF) 78 Page - WIZnet Co., Ltd

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