Configuration Eeprom - National Instruments MXI-2 Reference Manual

Chapter 5 VXI-MXI-2 Configuration and Installation

Configuration EEPROM

MXI-2 Configuration Reference Manual
Use switch 2 of U35 to select whether the VXI-MXI-2 automatically
controls termination of the MXIbus. Notice in Figure 5-8a that switch 1 has
no effect when switch 2 is set for automatic MXIbus termination. To control
termination manually, you must turn off switch 2. You can then use
switch 1 of U35 to manually control whether to terminate the MXIbus.
Restore Factory Configuration
Change Factory Configuration
Automatic MXIbus Termination
a. Automatic MXIbus Termination (Default)
Restore Factory Configuration
Change Factory Configuration
Automatic MXIbus Termination
Restore Factory Configuration
Change Factory Configuration
Automatic MXIbus Termination
The VXI-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—so you
can modify the user-configurable half while the factory-configured half
stores a backup of the default user settings.
Use switches 3 and 4 of the four-position switch at location U35 to control
the operation of the EEPROM. The Restore Factory Configuration switch
(switch 4) causes the VXI-MXI-2 to boot from the factory-configured half
Terminate MXIbus
Terminate MXIbus
b. Terminate MXIbus (On)
Terminate MXIbus
c. Do Not Terminate MXIbus (Off)
Figure 5-8. MXIbus Termination
5-12
U35
No Yes
No Yes
Yes No
Yes No
U35
No Yes
No Yes
Yes No
Yes No
U35
No Yes
No Yes
Yes No
Yes No
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