W3150 Datasheet, PDF (25/59 Pages) List of Unclassifed Manufacturers – WIZnet’s Online Technical Support

4.2. Socket Registers
Sn²_MR (Socket n Mode Register) [R/W] [0x0400, 0x0500, 0x0600, 0x0700] [0x00]³
This Register sets up socket option or protocol of the corresponding Socket.
7
6
5
4
3
2
1
0
ND
ZC
P3
P2
P1
P0
Bit Symbol
7 Reserved Reserved
6 Reserved Reserved
Description
Use No Delayed ACK
0 : disable No Delayed ACK, 1 : enable No delayed ACK
5
ND
It is applied only in case of TCP. If this bit is set as ‘1’, ACK packet is transmitted
whenver receiving data packet from the peer. If this bit is cleared to ‘0’, ACK packet is
transmitted according to internal Timeout mechanism.
Zero Chksum Enable
0 : disable Zero Chksum, 1 : enable Zero Chksum
4
ZC
It is applied only in case of UDP. If this bit is set as ‘1’, when the check sum of received
UDP packets is correct or 0x00, receiving is normally processed. If this bit is cleared to
‘0’, receiving is normally processed when check sum is correct.
Protocol
3
P3
Sets up corresponding Socket as TCP, UDP, IP RAW mode
P3 P2 P1 P0
Meaning
2
P2
0
0
0
0 Closed
0
0
0
1 TCP
0
0
1
0 UDP
1
P1
0
0
1
1 IP Raw
* In case of socket 0, more MAC RAW and PPPoE mode exist.
P3 P2 P1 P0
Meaning
0
P0
0
1
0
0 MAC Raw
0
1
0
1 PPPoE
2 _{n is socket number (0, 1, 2, 3).}
3 _{[Read/Write] [address of socket 0, address of socket 1, address of socket 2, address of socket 3] [Reset value]}
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