DA82562EM Intel, DA82562EM Datasheet - Page 156

• Manufacturer Part Number: DA82562EM
• Manufacturer: Intel

Specifications of DA82562EM

• Lead Free Status / Rohs Status: Not Compliant

Wake-up Functionality
A.7.2
A.7.3
148
Table 64. 82559 Port Commands
CRC Word calculation of a Flexible Filter
Port Dump Wake Up Packet
The 82559 Port commands are summarized in
up Packet command:
Following the Dump Wake-up command, the 82559 writes the stored data of the wake-up packet to
the host memory, starting at the address specified in the pointer field. The dump data structure is
shown below.
COEFFICIENTS = 0x04C11DB7;
Signature = 0;
for(n=i=0; n<128 & n<FrameLength; ++n)
{
Flexible Filter)
XOR
XOR
}
output bits 0-23 of Signature
Software Reset
Self Test
Selective Reset
Dump
Dump Wake-up
Function
if(Byte n of the Frame is in the
{
}
ShiftBy = (i modulo 3) * 8;
if(Signature AND 0x80000000)
{
}
else
{
Signature = (Signature << 1) XOR
}
++i;
10/100 Mbps Ethernet Controller Family Open Source Software Developer Manual
Signature = (Signature << 1)
(FrameByte << ShiftBy);
31
Don't care
Self test results pointer (16-byte alignment)
Don't care
Dump area pointer (16-byte alignment)
Dump area pointer (16-byte alignment)
(FrameByte << ShiftBy)
COEFFICIENTS;
Pointer Field
Table
// CRC Polynomial Coefficients
// Initialize the CRC Signature
// Search the frame, using only bytes
that are part of the flexible filter
pattern mask.
// Shift factor to move the frame byte to
bit position 0, 8 or 16 of the 32-bit
Dword.
// Bit position at 24 of the Dword is not
used, because the signature is only 24
bits.
// If the most significant bit is 1, XOR
in the coefficients, previous signature
and frame byte shifted over to the
proper position.
// Otherwise, just XOR the previous
signature and frame byte shifted over to
the proper position.
// Include the Dword slot for the next
frame byte that is in the pattern mask.
64, which also includes the new Dump Wake-
4
3
Opcode Field
0000
0001
0010
0011
0111
0