Vxibus Clk10 Routing - National Instruments MXI-2 Reference Manual

Chapter 5 VXI-MXI-2 Configuration and Installation

VXIbus CLK10 Routing

MXI-2 Configuration Reference Manual
a. Automatic Slot 0 Detection (Default)
Figure 5-3. VXIbus Slot Configuration
When the VXI-MXI-2 is installed in Slot 0, it becomes the VMEbus
System Controller. In this role, it has VMEbus Data Transfer Bus Arbiter
circuitry that accepts bus requests on all four VMEbus request levels,
prioritizes the requests, and grants the bus to the highest-priority requester.
As VMEbus System Controller, the VXI-MXI-2 also drives the 16 MHz
VMEbus system clock using an onboard 16 MHz oscillator.
As required by the VXIbus specification, the VXI-MXI-2 drives the
10 MHz signal CLK10 on a differential ECL output when installed in
Slot 0. When not installed in Slot 0, the VXI-MXI-2 only receives the
CLK10 signal.
When you install it in Slot 0 of your chassis, the VXI-MXI-2 supplies the
VXIbus CLK10 signal. The VXI-MXI-2 can use three different sources
to generate this signal: an onboard oscillator, the external CLK SMB
connector, and the MXIbus CLK10 signal. Use the three-position
jumper W3 to select these options, as shown in Figure 5-4.
Slot 0
Auto
Nonslot 0
W2
Slot 0
Auto
Nonslot 0
b. Manual Slot 0 Configuration
W2
Slot 0
Auto
Nonslot 0
c. Manual Non-Slot 0 Configuration
5-6 ni.com