PCIe Devices - PLX Technology
PCIe Devices - PLX Technology
PCIe Devices - PLX Technology
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>PCIe</strong> Transactions and Packets<br />
n<br />
<strong>PCIe</strong> transactions consist of one or more serial<br />
packets<br />
l<br />
Packets can vary in size depending on the command<br />
– Information about the transaction is defined in the fields in the<br />
<strong>PCIe</strong> packet headers<br />
• Packets may or may not have a payload and CRC(s)<br />
– Two basic packet types (Transaction Layer packets or TLPs<br />
and Data Link Layer packets or DLLPs )<br />
Physical/Data Link<br />
Header<br />
Transaction Layer<br />
Header<br />
Payload ECRC LCRC<br />
11010110100100010101101001011010001011100010111010001011010010111101011101111101101001011<br />
Device<br />
A<br />
<strong>PCIe</strong> Link<br />
Serial Packets<br />
Serial Packets<br />
Device<br />
B<br />
Copyright by Dashcourses, Inc. 2009<br />
1-27