The backplane connects the system slot to a PCI Express switch using a Gen-3 x8 and a Gen-3
x16 PCI Express link. The PCIe switch is divided into 2 logical PCIe switches to distribute
PCIe connections to the peripheral slots and to 2 PCIe-to-PCI bridges to provide PCI busses to
the hybrid peripheral slots.
System slot link 1 is a Gen-3 x8 PCI Express link to the primary PCI Express switch,
providing a nominal bandwidth of 8 GB/s (single direction) between the system controller and
logical PCI Express switch 1. PXI Express peripheral slots 2-4 are connected to logical PCI
Express switch 1 with Gen-3 x8 PCI Express links and are downstream of system slot link 1.
System slot link 2 is a Gen-3 x16 PCI Express link to the primary PCI Express switch,
providing a nominal bandwidth of 16 GB/s (single direction) between the system controller
slot and logical PCI Express switch 2. PXI Express peripheral slots 5-9 are connected to
logical PCI Express switch 2 with Gen-3 x8 PCI Express links and are downstream of system
slot link 2.
The PCI Express-to-PCI bridges are connected to logical PCI Express switch 2 and provide a
32-bit, 33 MHz PCI bus for hybrid peripheral slots 2, 3, 4, 5, 7, 8, and 9.
The system controller slot also has connectivity to some PXI features such as: PXI_CLK10,
PXI Star, PXI Trigger Bus, and PXI Local Bus 6. By default, the system controller controls the
power supply with the PS_ON# signals. A logic low on this line powers on the power supply.
Note
The chassis Inhibit Mode must be set to Default mode for the system
controller to control the power supply.
Hybrid Peripheral Slots
The chassis provides seven (7) hybrid peripheral slots as defined by the
PXI-5 PXI Express
Hardware Specification
: slots 2, 3, 4, 5, 7, 8, and 9. A hybrid peripheral slot can accept the
following peripheral modules:
•
A PXI Express peripheral with x8, x4, or x1 PCI Express link through a switch to the
system slot. Each PXI Express peripheral slot can link up to a Gen-3 x8 PCI Express,
providing a maximum nominal single-direction bandwidth of 8 GB/s.
•
A CompactPCI Express Type-2 Peripheral with x8, x4, or x1 PCI Express link to the
system slot or through a PCI Express switch to the system slot.
•
A hybrid-compatible PXI Peripheral module modified by replacing the J2 connector with
an XJ4 connector installed in the upper eight rows of J2. Refer to the
PXI Express
Specification
for details. The PXI peripheral communicates through the backplane’s 32-
bit PCI bus.
•
A CompactPCI 32-bit peripheral on the backplane’s 32-bit PCI bus.
The hybrid peripheral slots provide full PXI Express functionality and 32-bit PXI functionality
except for PXI Local Bus. The hybrid peripheral slot only connects to PXI Local Bus 6 left
and right.
PXIe-1092 User Guide
|
© National Instruments
|
7
