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IP100A LF
Preliminary Data Sheet
Received Packet
byte 12
byte 13
byte 21
byte 41
byte 40
byte 39
byte 38
Byte Offset
Within Packet
0x0c
0x29
0x28
0x27
0x26
0x15
0x0d
FIGURE 9: Example Wake Packet
The IP100A LF also supports Magic Packet™ technology developed by Advanced Micro Devices to
allow remote wake-up of a sleeping station on a network via transmission of a special frame. Once the
IP100A LF has been placed in Magic Packet mode and put to sleep, it scans all incoming frames
addressed to it for a data sequence consisting of 16 consecutive repetitions of its own 48-bit Ethernet
MAC StationAddress. This sequence can be located anywhere within the frame, but must be preceded
by a synchronization stream.
The synchronization stream is defined as 6 bytes of 0xFF. For example, if the MAC address
programmed into the StationAddress register is 0x11:22:33:44:55:66, then the IP100A LF would be
scanning for the frame data shown in Figure 10.
Received Packet
0xFFFFFFFFFFFF
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
0x112233445566
FIGURE 10: Example Magic Packet
Magic Packet wake up is controlled by the MagicPktEnable bit in the WakeEvent register. A wake event
March. 30, 2007
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Copyright © 2004, IC Plus Corp.
IP100A LF-DS-R17
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