Sn_Fragr (Socket N Fragment Offset Register); Sn_Mssr (Socket N Maximum Segment Register) - Wiznet W7500 Reference Manual

Sn_FRAGR (Socket n Fragment offset Register)

Address Offset : 0x010C
Reset value : 0x0000_4000
31 30 29 28
res Res Res res
15 14 13 12
R/W R/W R/W R/W
[15:0] Sn_FRAG configures the FRAG(Fragment field in IP header)
Ex) Sn_FRAGR = 0x0000 (Don't Fragment)

Sn_MSSR (Socket n Maximum Segment Register)

Address Offset : 0x0110
Reset value : 0x0000_0000
31 30 29 28
res Res Res res
15 14 13 12
R/W R/W R/W R/W
This register is used for MSS (Maximum Segment Size) of TCP, and the register displays MSS set
by the other party when TCP is activated in Passive Mode.
Ex) In case of Socket 0 MSS = 1460 (0x05B4), configure as below,
W7500x Reference Manual Version1.1.0
27 26 25 24
res res res res
11 10 9 8
Sn_FRAG[15:0]
R/W R/W R/W R/W
Sn_FRAG[15:8]
0x00
27 26 25 24
res res res res
11 10 9 8
Sn_MSS[15:0]
R/W R/W R/W R/W
0x4101_0110
0x05B4
23 22 21 20
res res res res
7 6 5 4
R/W R/W R/W R/W
Sn_FRAG[7:0]
0x00
23 22 21 20
res Res res res
7 6 5 4
R/W R/W R/W R/W
19 18 17 16
res res res res
3 2 1 0
R/W R/W R/W R/W
19 18 17 16
res res res res
3 2 1 0
R/W R/W R/W R/W
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