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W5100S Datasheet(PDF) 40 Page - WIZnet Co., Ltd

Part # W5100S
Description  embedded Ethernet controller
PDF  110 Pages
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Manufacturer  WIZNET [WIZnet Co., Ltd]
Direct Link  https://www.wiznet.io/ko/Product/
Logo WIZNET - WIZnet Co., Ltd

W5100S Datasheet(HTML) 40 Page - WIZnet Co., Ltd

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W5100S Datasheet Version1.2.5
3.2
SOCKET Register
3.2.1 Sn_MR (SOCKET n Mode Register)
[R=W] [0x0000+0x0100*(n+4)] [0x00]
Sn_MR configures SOCKET Mode and Option. Sn_MR must be set before SOCKET OPEN (Sn_CR
[OPEN] = ‘1’).
7
6
5
4
3
2
1
0
MULTI
MF
ND / MC
-
P3
P2
P1
P0
R=W
R=W
R=W
-
R=W
R=W
R=W
R=W
Bit
Symbol
Description
7
MULTI
UDP Multicast
This Bit is valid only on UDP Mode. (Ref 4.4.3 UDP Multicast)
1 : Enable UDP Multicast
0 : Disable UDP Multicast
6
MF
MAC Filter Enable
This Bit is valid only on MACRAW Mode.
If This Bit is set to ‘1’, W5100S block all Packets without Multicast,
Broadcast and the Packets no having Source MAC (SHAR).
1 : Enable MAC Filter.
0 : Disable MAC Filter
5
ND / MC
No Delayed ACK (ND)
This Bit is valid only on TCP Mode.
If this Bit is set to ‘1’, TCP Mode SOCKET transmits ACK Packet without
waiting RTR after receiving Data Packet from Peer.
1 : Enable No Delayed ACK
0 : Disable No Delayed ACK
Ref) After Sn_CR[RECV] Command operating, If TCP Mode SOCKET
Window Size is smaller than MSS, it sends ACK packet immediately. (no
concerned with ND Bit)
Multicast IGMP Version (MC)
This Bit is valid only on UDP Multicast Mode (Sn_MR[3:0] = ‘UDP’ &
Sn_MR[MULTI] = ‘1’)



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