W5100 WIZnet, W5100 Datasheet - Page 33

• Manufacturer Part Number: W5100
• Description: Ethernet ICs 3-IN-1 ENET CONTR TCP/IP+MAC+PHY
• Manufacturer: WIZnet

Specifications of W5100

• Rohs: yes
• Product: Ethernet Controllers
• Data Rate: 10 Mb/s, 100 Mb/s
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V
• Maximum Operating Temperature: + 80 C
• Package / Case: LQFP-80
• Ethernet Connection Type: 10Base-T, 100Base-TX
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Standard Supported: 802.3, 802.3u

Sn_PROTO (Socket n IP Protocol Register) [R/W] [0x0414, 0x0514, 0x0614, 0x0714]
[0x00]
This IP Protocol Register is used to set up the Protocol Field of IP Header at the IP Layer RAW
Mode. There are several protocol numbers defined in advance by registering to IANA. For the
overall list of upper level protocol identification number that IP is using, refer to online
documents of IANA (http://www.iana.org/assignments/protocol-numbers).
Ex) Internet Control Message Protocol (ICMP) = 0x01, Internet Group Management Protocol =
0x02
Sn_TOS (Socket n IP Type Of Service Register) [R/W] [0x0415,0x0515,0x0615,0x0715]
[0x00]
This register sets up at the TOS(Type of Service) Field of IP Header.
Sn_TTL (Socket n IP Time To Live Register) [R/W] [0x0416,0x0516,0x0616,0x0716] [0x80]
This register sets up at the TTL(Time To Live) Field of IP Header.
Sn_TX_FSR (Socket n TX Free Size Register) [R] [0x0420-0x0421, 0x0520-0x0521,
0x0620-0x0621, 0x0720-0x0721] [0x0800]
This register notifies the information of data size that user can transmit. For data
transmission, user should check this value first and control the size of transmitting data.
When checking this register, user should read upper byte(0x0420,0x0520,0x0620,0x0720) first
and lower byte(0x0421,0x0521,0x0621,0x0721) later to get the correct value.
Ex) In case of 2048(0x0800) in S0_TX_FSR,
0x0420
0x0421
0x08
0x00
Total size can be decided according to the value of TX Memory Size Register. In the process of
transmission, it will be reduced by the size of transmitting data, and automatically increased
after transmission finished.
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