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Chapter 4 VME-MXI-2 Configuration and Installation
PCI-MXI-2 for Linux 4-6 ni.com
Switch 4 has no effect when switch 3 is set for automatic MXIbus
termination; you must turn off automatic termination if you want to
manually control termination.
Figure 4-4. MXIbus Termination
Configuration EEPROM
The VME-MXI-2 has an onboard EEPROM, which stores default register
values that are loaded at power-on. The EEPROM is divided into two
halves—a factory-configuration half, and a user-configuration half. Both
halves were factory configured with the same configuration values so you
can modify the user-configurable half, while the factory-configured half
stores a back-up of the default user settings.
Use switches 1 and 2 of the four-position switch at location U21 to control
the operation of the EEPROM. The Restore Factory Configuration switch
(switch 1) causes the VME-MXI-2 to boot off the factory-configured half
instead of the user-modified settings. This is useful in the event that the
a. Automatic MXIbus Termination (Default)
b. Terminate MXIbus (On)
c. Do Not Terminate MXIbus (Off)
U21
OFF
1234
U21
OFF
1234
U21
OFF
1234