C
URTISS
-W
RIGHT
P
RODUCT
O
VERVIEW
826448 V
ERSION
5 M
ARCH
2015
P
ROPRIETARY
1-7
PCI E
XPRESS
A
RCHITECTURE
The CHAMP-AV8 makes use of the PCIe interfaces included in the CPU to share and transfer
data between the processors, between cards via the P2 Expansion Plane connectors, and to
communicate with the XMC site, as shown in Figure 1.3 below.
Figure 1.3: CHAMP-AV8 PCI Express Distribution
Each processor connects with an on-board PCIe switch via an 8-lane Gen2 PCIe interface. The
PCIe switch features non-transparent ports allowing each processor a full memory map, and
access to the memory of the other processor. The CHAMP-AV8 presents two PCIe ports to the
P2 expansion plane connector to form connections to I/O devices and/or other cards enabled
with PCIe on P2 (such as the CHAMP-AV8). See Table 1.1, “XMC/Expansion Plane Interface
Build-Time Options for PCIe,” on page 1-8 for details. PCIe switch ports connected to P2
and/or the XMC site may be configured to enable or disable non-transparency, and may
therefore be used with endpoints or root complexes.
I/O Hub
PCIe
Switch
SDRAM
Control
SDRAM
Control
L3
PCIe
PCIe
PCIe
32- Lane
NT
NT
Build
Option
NT, DMA
NT, DMA
XMC
Pn4 J6
x8
Port 16, 20
Port 4
Node A
L1 / L2
Core
Core
Core
L1 L2
/
Core
L1 L2
/
L1 L2
/
Node A
SDRAM
Control
SDRAM
Control
L3
PCIe
L1 / L2
Core
Core
Core
PCIe
PCIe
L1 L2
/
Core
L1 L2
/
L1 L2
/
x8
x8
Port 0,2
Port 8,12
DMI x4
DMI x4
P2
EP[08:15]
P2
EP[00:07]
Intel Core i7 quad-core
Intel Core i7 quad-core
x4
Port 6
x4
x8/x0
I/O Hub
x0
2 x4 /
1 x8
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