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0x1C
SOCK_CLOSE_WAIT
0x22
SOCK_UDP
0x42
SOCK_MACRAW
The following table shows a temporary status indicated during changing the status of Socket
n.
Value
Symbol
0x15
SOCK_SYNSENT
0x16
SOCK_SYNRECV
W7500 Datasheet Version1.0.0
During SOCK_ESTABLISHED, DATA packet can be transferred
using SEND or RECV command.
This indicates Socket n received the disconnect-request (FIN
packet) from the connected peer. This is half-closing status,
and data can be transferred. For full-closing, DISCON command
is used. But For just-closing, CLOSE command is used.
This indicates Socket n is opened in UDP mode(Sn_MR(P[3:0]) =
„0010‟).
It changes to SOCK_UDP when Sn_MR(P[3:0]) = „0010‟) and
OPEN command is ordered.
Unlike TCP mode, data can be transfered without the
connection-process.
This
indicates
Socket
(S0_MR(P[3:0]) = „0100‟)and is valid only in Socket 0.
It changes to SOCK_MACRAW when S0_MR(P[3:0] = „0100‟ and
OPEN command is ordered.
Like UDP mode socket, MACRAW mode Socket 0 can transfer a
MAC packet (Ethernet frame) without the connection-process.
This indicates Socket n sent the connect-request packet (SYN
packet) to a peer.
It is temporarily shown when Sn_SR is changed from
SOCK_INIT to SOCK_ESTABLISHED by CONNECT command.
If connect-accept(SYN/ACK packet) is received from the
peer at SOCK_SYNSENT, it changes to SOCK_ESTABLISHED.
Otherwise, it changes to SOCK_CLOSED after TCPTO
(Sn_IR[TIMEOUT] = „1‟) is occurred.
It indicates Socket n successfully received the connect-
request packet (SYN packet) from a peer.
If socket n sends the response (SYN/ACK
peer successfully, it changes to SOCK_ESTABLISHED. If not,
it
changes
to
(Sn_IR[TIMEOUT] = „1‟).
0
is
opened
in
Description
SOCK_CLOSED
after
MACRAW
mode
packet) to the
timeout
occurs
70 / 512
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