Chapter 4
Register Map and Descriptions
AT-MIO-16X User Manual
4-22
©
National Instruments Corporation
update. If DACMB3 is set, the circuitry
will determine whether to perform one
read or two reads from the DAC FIFO
depending on the data in the FIFO. See
Table 4-6 for available modes and bit
patterns.
7
DACGATE
DAC Update Gate—This bit controls the
update circuitry for the DACs in the
delayed update mode. If DACGATE is
set, updating of the DACs is inhibited.
Table 4-6. Analog Output Waveform Modes
Waveform Mode
Mode Description
D
ACMB
3
D
ACMB
2
D
ACMB
1
D
ACMB
0
0
0
0
0
Single update with no timed interrupts
1
0
0
0
Single update with timed interrupts
X
0
0
1
DMA access through DAC FIFO (with single
requesting)
X
0
1
0
DMA access through DAC FIFO (with half flag
requesting)
X
0
1
1
FIFO continuous waveform generation (buffer
in DAC FIFO)
X
1
0
0
Programmed cycle waveform generation
(Counter 1 stops after N cycles)
X
1
0
1
Programmed cycle waveform generation
(Counter 2 stops after N cycles)
X
1
1
0
Programmed cycle waveform generation
(Counter 5 stops after N cycles)
X
1
1
1
Pulsed waveform (Counter 1 stops after N cycles,
Counter 2 restarts)
Summary of Contents for DAQ AT-MIO-16X
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