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W5200 Scheda tecnica(PDF) 53 Page - WIZnet Co., Ltd

Il numero della parte W5200
Spiegazioni elettronici  Microcontroller
PDF  88 Pages
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Produttore elettronici  WIZNET [WIZnet Co., Ltd]
Homepage  https://www.wiznet.io/ko/Product/
Logo WIZNET - WIZnet Co., Ltd

W5200 Scheda tecnica(HTML) 53 Page - WIZnet Co., Ltd

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53
ESTABLISHMENT: Timeout
The timeout can occur by Connect-request(SYN packet) or its response(SYN/ACK packet),
the DATA packet or its response(DATA/ACK packet), the Disconnect-request(FIN packet)
or its response(FIN/ACK packet) and transmission all TCP packet. If it cannot transmit
the above packets within ‘timeout’ which is configured at RTR and RCR, the TCP final
timeout(TCPTO) occurs and the state of Sn_SR is set to SOCK_CLOSED. Confirming method
of the TCPTO is as below:
First method :
{
if (Sn_IR(TIMEOUT bit) == ‘1’) Sn_IR(TIMEOUT)=‘1’; goto CLOSED stage;
/* In this case, if the interrupt of Socket n is activated, interrupt occurs. Refer to IR,
IMR Sn_IMR and Sn_IR. */
}
Second method :
{
if (Sn_SR == SOCK_CLOSED) goto CLOSED stage;
}
SOCKET Close
It can be used to close the Socket n , which disconnected by disconnect-process, or
closed by TCPTO or closed by host’s need without disconnect-process.
{
/* clear the remained interrupts of Socket n */
Sn_IR = 0xFF;
IR(n) = ‘1’;
/* set CLOSE command */
Sn_CR = CLOSE;
}



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