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EEPROM Configuration
Controlling the EEPROM Operation
Caution
Do not alter the settings of switches 3 and 4 of U17. Leave these switches as
shown in Figure B-1 unless specifically directed by National Instruments.
© National Instruments Corporation
This appendix describes how to control the operation of the PCI-MXI-2
onboard EEPROM and how to fix an invalid EEPROM setting.
The EEPROM stores default registers 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 back-up of the default user
settings.
Use switch 1 (FOV) of the four-position switch at location U17 (SW1 on
Universal) to control the operation of the EEPROM. Switch 1 determines
whether the PCI-MXI-2 boots off the factory-configured half or the
user-configurable half. In its default setting, the PCI-MXI-2 boots off 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 boots
to an unusable state.
The TST switch (switch 2 of U17 on the PCI-MXI-2, or SW1 on the
PCI-MXI-2 Universal) 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 1 of U17 or SW1.
Figure B-1 shows the default settings for EEPROM operation.
B-1
B
PCI-MXI-2 for Linux
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