Wiznet W7500 Reference Manual page 87

res res Res res
15 14 13 12
res Res Res res
Sn_MR configures the option or protocol type of Socket n.
[3:0] These bits configures the protocol mode of Socket n as follows

[4] UNICAST Blocking and IPv6 packet Blocking
UNICAST Blocking in UDP mode
0 : disable Unicast Blocking
1 : enable Unicast Blocking
This bit blocks receiving the unicast packet during UDP mode(P[3:0] = '0010') and MULTI = '1'.
IPv6 packet Blocking in MACRAW mode
0 : disable IPv6 Blocking
1 : enable IPv6 Blocking
This bit is applied only during MACRAW mode (P[3:0] = '0100'). It blocks to receiving the IPv6
packet.
[5] Use No Delayed ACK, Multicast and Multicast Blocking mode
Use No Delayed ACK
0 : Disable No Delayed ACK option
1 : Enable No Delayed ACK option
This bit is applied only during TCP mode (P[3:0] = '0001').When this bit is '1', It sends the ACK
packet without delay as soon as a
W7500x Reference Manual Version1.1.0
res res res
11 10 9
res res res
Sn_MR[3:0]
0 0 0
0 0 0
0 0 1
0 1 0
MACRAW mode should be only used in Socket 0.
res res res res
8 7 6 5
res
R/W R/W R/W
Meaning
0 Closed
1 TCP
0 UDP
0 MACRAW
res res res res
4 3 2 1
Sn_MR[7:0]
R/W R/W R/W R/W
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res
0
R/W