W5300 datasheet(69/128 Pages) WIZNET

69 / 128 page

It is valid only in UDP

(P3~03 : “0010”).

In order to implement multicasting, set the IP address and port number in

Sn_DIPR and Sn_DPORTR respectively before "OPEN" command.

MAC Filter

0 : Disable MAC filter

1 : Enable MAC filter

is valid in MACRAW(P3~P0 : “0100”).

When this bit is set as ‘1’, W5300 can receive packet that is belong in itself

or broadcasting. When this bit is set as ‘0’, W5300 can receive all packets on

Ethernet. When using the hybrid TCP/IP stack, it is recommended to be set

as ‘1’ for reducing the receiving overhead of host.

ND/IGMPv

Use No Delayed ACK

0 : Disable no delayed ACK option

1 : Enable no delayed ACK option

is valid in TCP(P3~P0 : “0001”).

In case that it is set as '1', ACK packet is transmitted right after receiving

DATA packet from the peer. It is recommended to be set as '1' for TCP

performance improvement.

In case that it is set as '0', ACK packet is transmitted after the time set in

RTR regardless of DATA packet receipt.

IGMP version

0 : using IGMP version 2

1 : using IGMP version 1

is valid in case of MULTI='1' and UDP(P3~P0 : “0010”).

configures

IGMP

version

send

IGMP

message

such

Join/Leave/Report to multicast-group.

Reserved

Protocol

It configures communication protocol (TCP, UDP, IP RAW, MAC RAW) in

each SOCKET or PPPoE SOCKET to operate with PPPoE server.

W5300 Datasheet(PDF) 69 Page - WIZnet Co., Ltd