What status is W5100 Status Register Sn_SR indicating?

What status is the value 0x01 of W5100 Status Register Sn_SR indicating?
The value 0x01 of Sn_SR is not specified in anywhere of W5100 datasheet.
When I have connected W5100 with TCP client mode to TCP server, then
the status register Sn_SR of W5100 has returned the value 0x01.
What meaning is the value 0x01 of Sn_SR?
Please teach me these phenamina in detail.

Hi.

It is SOCK_ARP mode.

please check to W5100 datasheet 30page to Sn_SR tap.

W5100 datasheet bellow link
wiznet.co.kr/wp-content/uplo … v1.2.6.pdf

Thank you

Hello

Thank you for your answer.
I got cleared up my problem.

Regards, K.Ogawa