W7100A WIZnet, W7100A Datasheet - Page 128

• Manufacturer Part Number: W7100A
• Description: 8-bit Microcontrollers - MCU 8051 CORE+HARDWIRED TCP/IP+MAC+PHY
• Manufacturer: WIZnet

Specifications of W7100A

• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 255 B
• Data Ram Size: 64 KB
• On-chip Adc: No
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 80 C
• Package / Case: LQFP-100
• Mounting Style: SMD/SMT
• Interface Type: UART
• Program Memory Type: Flash

© Copyright 2011 WIZnet Co., Inc. All rights reserved.
protocol. The multicast-group consists of ‘Group hardware address’, ‘Group IP address’ and
‘Group port number’. User cannot change the ‘Group hardware address’ and ‘Group IP
address’. But the ‘Group port number’ can be changed to what user wants.
to “01:00:5e:7f:ff:ff”) and the ‘Group IP address’ is selected in D-class IP address (From
“224.0.0.0”
U
6bytes ‘Group hardware address’ and the 4bytes ‘Group IP address’ must be the same. For
example, if the user selects the ‘Group IP address’ to “244.1.1.11”, the ‘Group hardware
address’
(
processed. When the user opens the SOCKET n with multicast mode, the “Join” message is
internally transmitted. If the user closes it, the “Leave” message is internally transmitted.
After the SOCKET opens, the “Report” message is periodically and internally transmitted
when the user communicates.
the host processes IGMP directly by using the IPRAW mode SOCKET.
Sn_DHAR0 to ‘Multicast-group hardware address’ and set the Sn_DIPR0 to ‘Multicast-group IP
address’. Then set the Sn_PORT0 and Sn_DPORT0 to ‘Multicast-group port number’. Then set
the Sn_MR(P3:P0) to UDP and set the Sn_MR(MULTI) to ‘1’. Finally execute OPEN command. If
the state of Sn_SR is changed to SOCK_UDP after the OPEN command, the SOCKET
initialization is completed.
{
START:
http://www.iana.org/assignments/multicast-addresses

U
http://www.ietf.org/rfc.html
The ‘Group hardware address’ is selected at the assigned range (From “01:00:5e:00:00:00”
In the W7100A, IGMP processing to register the multicast-group is internally (automatically)
The W7100A support IGMP version 1 and version 2 only. If user wants use an updated version,
Choose one SOCKET for multicast communication among 8 SOCKETS of W7100A. Then set the
/* set Multicast-Group information */
Sn_DHAR0 = 0x01;
Sn_DHAR1 = 0x00;
Sn_DHAR2 = 0x5E;
Sn_DHAR3 = 0x01;
Sn_DHAR4 = 0x01;
Sn_DHAR5 = 0x0B;
Sn_DIPR0 = 211;
Sn_DIPR1 = 1;
Sn_DIPR2 = 1;
SOCKET Initialization
is
selected
to
“239.255.255.255”,
to
/* set Multicast-Group H/W address(01:00:5e:01:01:0b) */
/* set Multicast-Group IP address(211.1.1.11) */
U
).
“01:00:5e:01:01:0b”.
please
U
). When selecting, the upper 23bit of
Please
refer
refer
to
to
Ver. 1.12
the
the
“RFC1112”
website;
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