Data Sheet
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36
iEthernet 
W5200
to online document (
U
http://www.iana.org/assignments/protocol-numbers
U
). 
Ex) Internet Control Message Protocol (ICMP) = 0x01, Internet Group Management Protocol 
= 0x02   
Sn_TOS (Socket n IP Type Of Service Register) [R/W] [0x4015+0x0n00] [0x00] 
It sets the TOS(Type of Service) field of the IP header at the IP layer. It should be set before 
the OPEN command. Refer to 
U
http://www.iana.org/assignments/ip-parameters
U
. 
Sn_TTL (Socket n IP Time To Live Register) [R/W] [0x4016+0x0n00] [0x80] 
It sets the TTL(Time To Live) field of the IP header at the IP layer. It should be set before the 
OPEN command. Refer to 
U
http://www.iana.org/assignments/ip-parameters
U
. 










