Assigning an Interrupt
2-21
The Burst Period can be 3.0 to 64µs. A/D conversion begins one burst
period after an active edge of the sample clock. Burst mode must be
used when SSH hardware is connected to DAS-1800HC Series
boards.
When not generating SSHO for SSH hardware control, you can use
SSHO as a converter clock output signal. SSHO becomes active only
when software enables A/D conversions. The timing for SSHO generation
when the DAS-1800HC Series boards are not used for SSH hardware
control is shown in Figure 2-8.
Figure 2-8. Timing for SSHO Generation when not used
for SSH Hardware
Assigning an Interrupt
You assign an interrupt level to a DAS-1800 Series board through the
DriverLINX software configuration (see “DriverLINX Configuration
Notes” on page C-1). When you install more than one board in a
computer, assign interrupt levels to the boards in one of the following
ways:
●
Assign a different interrupt level to each board (if enough levels are
available).
●
Assign the same interrupt level to some boards and different interrupt
levels for each of the remaining boards.
active edge
300ns typical
a. SSHO with External Pacer Clock
300ns typical
b. SSHO with Internal Pacer Clock
External Clock
SSHO
Internal Clock
SSHO
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