National Instruments MXI-2 Reference Manual page 93

EEPROM Configuration
Controlling the EEPROM Operation
Do not alter the settings of switches 3 and 4. Leave these switches as shown
Caution
unless specifically directed by National Instruments.
© National Instruments Corporation
This appendix describes how to control the operation of the PCI-MXI-2,
PCI-MXI-2 Universal, or PXI-8320 onboard EEPROM and how to fix an
invalid EEPROM setting.
The EEPROM stores default register values that are loaded at power-on.
The EEPROM is divided into two halves so that you can modify one half,
while the factory-configured half retains a backup of the default user
settings.
Use switch 1 (FOV) of the four-position switch (at location U17 on the
PCI-MXI-2, SW1 on the PCI-MXI-2 Universal, or U6 on the PXI-8320) to
control the operation of the EEPROM. Switch 1 determines whether the
PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320 boots from the
factory-configured half or the user-configurable half. In its default setting,
the PCI-MXI-2, PCI-MXI-2 Universal, or PXI-8320 boots from the
user-configurable half. This switch is useful in the event that the
configuration becomes corrupted in such a way that the PCI-MXI-2,
PCI-MXI-2 Universal, or PXI-8320 boots to an unusable state.
The TST switch (switch 2 of U17, U6, or SW1) lets you change the default
factory configuration settings by permitting writes to the factory settings
section of the EEPROM. This switch serves as a safety measure and is not
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 are ignored. The factory area is protected
regardless of the setting of switch 1.
Figures B-1 and B-2 show the default settings for EEPROM operation.
B-1 MXI-2 Configuration Reference Manual
B