Dac1 Register - National Instruments AT-MIO-16D User Manual

Programming

DAC1 Register

Writing to DAC1 loads the corresponding analog output channel DAC. The voltages generated
by the analog output channels are updated either immediately or when an active low pulse occurs
on OUT2. The update method is selected by the LDAC bit in Command Register 2.
Address: Base address + 12 (hex)
Type: Write-only
Word Size: 16-bit
Bit Map:
15 14 13 12
X X X X
Bit Name
15-12 X
11-0 D<11..0>
AT-MIO-16D User Manual
11 10 9 8
D11 D10 D9 D6
MSB
Description
Don't care bits.
These twelve bits are loaded into the DAC and update the voltage
generated by the analog output channel in one of two ways,
immediately or upon an OUT2 pulse. See the Programming the
Analog Output Circuitry section later in this chapter for Tables 4-5
and 4-6, both of which map digital values to output voltage.
7 6 5 4
D7 D6 D5 D4
4-18 © National Instruments Corporation
Chapter 4
3 2 1 0
D3 D2 D1 D0
LSB