W5500 Datasheet, PDF (45/65 Pages) List of Unclassifed Manufacturers – Supports 8 independent sockets simultaneously

Data packet is received from a peer. When this bit is „0‟, It sends the ACK
packet after waiting for the timeout time configured by RTR.
Multicast
0 : using IGMP version 2
1 : using IGMP version 1
This bit is applied only during UDP mode(P[3:0] = „0010‟) and MULTI =
„1‟.
It configures the version for IGMP messages (Join/Leave/Report).
Multicast Blocking in MACRAW mode
0 : disable Multicast Blocking
1 : enable Multicast Blocking
This bit is applied only when MACRAW mode(P[3:0] = „0100‟). It blocks to
receive the packet with multicast MAC address.
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‟.
UCASTB
4
MIP6B
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.
Protocol
3
P3
This configures the protocol mode of Socket n.
2
P2
P3
P2
P1
P0
Meaning
1
P1
0
0
0
0
0
0
0
1
Closed
TCP
0
0
1
0
UDP
0
P0
0
1
0
0
MACRAW
* MACRAW mode should be only used in Socket 0.
W5500 Datasheet Version1.0 (August 2013)
45 / 65