C-4
DriverLINX Configuration Notes
AI IRQ
You must select an interrupt request level to support IRQ or DMA mode
data transfer. Valid IRQ levels are: 3, 5, 7, 10, 11, or 15. Two devices can
share interrupt lines only if not used simultaneously.
AI DMA 1, AO DMA 1
You must select DMA and IRQ levels to support DMA mode data transfer
for analog input. The DAS-1800AO also supports DMA operation for
analog output. Valid DMA levels are: 5, 6, or 7. Two devices can share
DMA levels only if not used simultaneously.
Clock
The counter/timer input from the master clock for analog input (and
output for DAS-1800AO) has a fixed frequency of 5MHz.
Special Device Settings
The DAS-1800 series driver has special settings. To specify these settings,
you click the
Special
button on the
Device
property page and enter them
in the
Configure DAS-1800 Options
dialog box.
Common-mode reference
The DAS-1800 has two options for the grounding single-ended analog
inputs. They determine the ground reference for the A/D input amplifier.
●
LL GND — references the analog ground
●
U_CM MD — references the user-common ground
Use the U_CM MD setting to eliminate ground-loops.
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