AMX DESIGN XPRESS V 1.5 - PROGRAMMER GUIDE Guide de l'utilisateur Page 114

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114 www.xilinx.com Virtex-5 FPGA Integrated Endpoint Block
UG197 (v1.5) July 22, 2009
R
O
Ordered set
The sequences of multiples of four characters starting with a comma
(COM) character. These special sequences of characters are used
during link training, clock compensation, electrical idle, and L0s exit.
P
Packet
A unit of data transferred across a PCI Express Link. The three types
of packets are TLPs, DLLPs, and PLPs.
PB
Power Budgeting.
Physical Layer
The lowest of the three layers in the PCI Express architecture. See
“Physical Layer” on page 19.
PM
Power Management.
Port
The interface between a PCI Express component and the Link,
consisting of the transmitters and receivers on a chip associated with
the Link.
Q
QWORD, QW
Eight bytes.
R
Requester
The device that first initiates a PCI Express transaction sequence by
executing a requester transaction.
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