EVB-B1+ WIZnet, EVB-B1+ Datasheet - Page 79

• Manufacturer Part Number: EVB-B1+
• Description: Development Boards & Kits - ARM W3150A+EVAL BOARD BASED ON AVR
• Manufacturer: WIZnet

Specifications of EVB-B1+

• Rohs: yes
• Product: Evaluation Boards
• Interface Type: RS-232, SPI
• Operating Supply Voltage: 3.3 V, 5 V
• Data Bus Width: 8 bit
• Dimensions: 50 mm x 40 mm
• Processor Series: ATmega128

Code 0 to Code 255. From Code1 to Code 254, codes are composed of pairs of {Code, Len, Value}, and
Code 0 and Code 255 are composed of {Code} only. For further explanation of each Code of Option Field,
refer to RFC1533.
In the Option Field of 312 Bytes, the unused bytes are denoted with 0’s padding.
<Table 3-34> is defined as enumeration data type in “inet/dhcp.h” and shows most common Option Codes
that are used in DHCP Client Program.
Other codes that are not defined in <Table 3-34> are skipped from DHCP Client Program.
Code
255
12
50
51
53
54
55
61
0
1
3
6
padOption
subnetMask
routersOnSubnet
dns
hostName
dhcpRequestedIPaddr
dhcpIPaddrLeaseTime
dhcpMessageType
dhcpServerIdentifier
dhcpParamRequest
dhcpClientIdentifier
endOption
Enumeration Type
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<Table 3-33: DHCP Message Option Code Definition>
<Fig 3.27: DHCP Message’s Option Field Format>
used to cause subsequent fields to align on word boundaries
specifies the client's subnet mask
a list of IP addresses for routers on the client's subnet
specifies a list of DNS servers available to the client
specifies the name of the client
request that a particular IP address be assigned by the server
a lease time for the IP address
used to convey the type of the DHCP message
the IP address of the selected server
request values for specified configuration parameters
specify client unique identifier
marks the end of valid information
Description
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