Eeprom; Figure 3-3. Smb Trigger Input Termination - National Instruments VXIpc-745-100 User Manual

EEPROM

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W12
a. Trigger Input
Unterminated (Default)

Figure 3-3. SMB Trigger Input Termination

The VXIpc-700 has an onboard EEPROM, which stores default register
values for the VXI circuitry. These values are loaded when you power up
the computer. These values read from the EEPROM tell the PCI interface
of the VXIbus registers so that the VXI interface is ready to respond to
Resource Manager accesses within the required 5 s of SYSRST*
deasserting. You can change jumper W10 to disable this power-on
self-configuration (POSC) circuit. Although this makes the VXI circuitry
unusable, it is sometimes helpful in debugging address and interrupt
conflicts with add-in boards. In general, however, you should leave W10 in
its factory-default setting. Figure 3-4 shows the possible configurations
for W10.
a. VXI Circuitry Loads Power-on
Defaults from EEPROM (Default)
Figure 3-4. Power-on Self Configuration Status
The EEPROM is divided into two halves; one half is factory configured and
one half is user configurable. Use jumper W7 to control the operation of the
EEPROM. The setting of this jumper determines whether the VXIpc-700
boots off the factory-configured half or 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 VXIpc-700 boots to an unusable state. In
its default setting, the VXIpc-700 boots off the user-configurable half.
Chapter 3 VXIpc 700 Series Configuration and Installation
b. Terminate Trigger Input
W10
b. Power-on Self Configuration
3-5
W12
W10
Circuit is Disabled
VXIpc 700 Series User Manual