User manual

Chapter 3 VXI-MXI-2 Configuration and Installation

Configuration EEPROM

The VXI-MXI-2 has an onboard EEPROM, which stores default

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 factory 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 off the

factory-configured half instead of the user-modified settings. This is

useful in the event that the user-configured half of the EEPROM

becomes corrupted in such a way that the VXI-MXI-2 boots to an

unusable state.

The Change Factory Configuration switch (switch 3 of U35) lets you

change the factory-default configuration settings by permitting writes

to the factory settings section of the EEPROM. This switch serves as a

safety measure and should not be needed under normal circumstances.

When this switch is off (its default setting) the factory configuration

of the EEPROM is protected, so any writes to the factory area will be

ignored. The factory area is protected regardless of the setting of

switch 4 of U35.

Figure 3-10 shows the configuration settings for EEPROM operation.

The settings of switches 1 and 2 have no effect on EEPROM

configuration.