Chapter 3 VXI-MXI-2 Configuration andI nstallation
© National Instruments Corporation 3-3 PCI-MXI-2 for Linux
Front Panel Features
The VXI-MXI-2 has the following front panel features:
• Three front panel LEDs
–SYSFAIL LED indicates that the VMEbus SYSFAIL line is
asserted.
–MXI LED indicates when the VXI-MXI-2 is accessed from the
MXIbus.
–VXI LED indicates when the VXI-MXI-2 is accessed from the
VXIbus.
• MXIbus connector
• Three SMB connectors
– External clock
– Trigger output
– Trigger input
• System reset pushbutton
Removing the Metal Enclosure
The VXI-MXI-2 is housed in a metal enclosure to improve EMC
performance and to provide easy handling. Because the enclosure includes
cutouts to facilitate changes to the switch and jumper settings, it should not
be necessary to remove it under normal circumstances.
However, it is necessary to remove the enclosure if you want to change
theam ount of DRAM installed on the VXI-MXI-2. Switch S6, which is
directly related to the amount of DRAM you want to install, is also
accessible only by removing the enclosure. If you will be making this
change, remove the four screws on the top, the four screws on the bottom,
and the five screws on the right side cover of the enclosure. Refer to the
Onboard DRAM section for details about changing DRAM.
VXIbus Logical Address
Each device in a VXIbus/MXIbus system is assigned a unique number
between 0 and 254. This 8-bit number, called the logical address, defines
the base address for the VXI configuration registers located on the device.
With unique logical addresses, each VXIbus device in the system is
assigned 64 bytes of configuration space in the upper 16 KB of A16 space.