Chapter 4 Register Map and Descriptions
AT-MIO-16X User Manual 4-50
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National Instruments Corporation
DAQ Start Register
Accessing the DAQ Start Register location initiates a multiple A/D
conversion data acquisition operation.
Note: Several other pieces of AT-MIO-16X circuitry must be set up before a data
acquisition run can occur. See Chapter 5, Programming.
Address: Base address + 1D (hex)
Type: Read-only
Word Size: 8-bit
Bit Map: Not applicable, no bits used
Strobe Effect: Initiates a programmed data acquisition sequence
Note: Multiple A/D conversion data acquisition operations can be initiated in one
of three ways—by accessing the Start DAQ Register, or by detecting an
active-low signal on either the EXTTRIG* or the RTSITRIG* signal. To
trigger the board with the Start DAQ Register, the RTSITRIG signal in
Command Register 1 must be cleared. In addition, either the EXTTRIG*
signal should be unasserted, or the EXTTRIG_DIS signal in Command
Register 4 must be set. Otherwise, strobing the Start DAQ Register has no
effect.
