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National Instruments Corporation
5
18-Slot NI PXIe-1065 Backplane Installation Guide
System Timing Slot
The system timing slot is slot 14. The system timing slot accepts the
following peripheral modules:
•
A PXI Express system timing module with a x4 or x1 PCI Express link
to the system slot through a PCIe switch.
•
A PXI Express peripheral with a x4 or x1 PCI Express link to the
system slot through a PCIe switch.
•
A CompactPCI Express Type-2 peripheral with a x4 or x1 PCI Express
link to the system slot through a PCIe switch.
The system timing slot has three dedicated differential pairs
(PXIe_DSTAR) connected from the TP1 and TP2 connectors to the XP3
connector for each PXI Express peripheral or hybrid peripheral slot, as well
as routed back to the XP3 connector of the system timing slot, as shown in
Figure 2. You can use the PXIe_DSTAR pairs for high-speed triggering,
synchronization, and clocking. Refer to the
PXI Express Specification
for
details.
The system timing slot also has a single-ended (PXI Star) trigger connected
to every slot. Refer to Figure 2 for details.
The system timing slot has a pin (PXI_CLK10_IN) through which a system
timing module can source a 10 MHz clock to which the backplane
phase-locks. Refer to the
System Reference Clock
section for details.
The system timing slot has a pin (PXIe_SYNC_CTRL) through which a
system timing module can control the PXIe_SYNC100 timing. Refer to the
PXI Express Specification
and the
PXIe_SYNC_CTRL
section for details.
