W3100A Datasheet, PDF (21/63 Pages) List of Unclassifed Manufacturers – i2Chip W3100A

SOPR (Socket Option and Protocol Register) [R/W, C0 : 0xA1, C1 : 0x B9, C2 : 0x D1, C3 : 0x
E9]
This register sets up socket option or protocol of the corresponding channel.
7
Broadcast/
ERR
6
NDTimeout/
B
5
NDAck
4
SWS/
P
3
2
1
0
Protocol Protocol Protocol
Bit
Symbol
Description
D0 Protocol
Sets up corresponding channel in TCP, UDP, IP Layer RAW mode or
D1
MAC Layer RAW mode
D2
Value
Meaning
000
Closed
001
SOCK_STREAM(TCP)
010
SOCK_DGRAM(UDP)
011
SOCK_IPL_RAW(IP Layer RAW Mode)
100
SOCK_MACL_RAW(MAC Layer RAW Mode)
D3
Reserved
D4 SWS/P
Silly Window Syndrome
‘0’: prevents Silly Window Syndrome when using TCP
‘1’: does not prevent Silly Window Syndrome when using TCP
When using MAC Layer RAW mode, promiscuous packet (packet with
specific MAC address) can be received by when C0_SOPR sets the bit
as ‘1’
D5 NDAck
No Delayed ACK
‘0’: uses delayed ACK
‘1’: does not use delayed ACK – ACK is transmitted immediately upon
receiving the data packet
D6 NDTimeout/B No Dynamic Timeout
‘0’: uses dynamic timeout during operation to set up timeout value
regardless of the set-up value
‘1’: activates by using the timeout value as set up in Timeout Value
When using MAC Layer RAW mode, broadcast packet can be received
by when C0_SOPR sets the bit as ‘1’
D7 Broadcast/ERR Broadcast packet is received and transmitted in IP Layer RAW mode
When using MAC Layer RAW mode, error packet can be received by
when C0_SOPR sets the bit as ‘1’
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