National Instruments PCI E Series Programmer's Manual

Chapter 3 Register Map and Descriptions
PCI E Series RLPM 3-20
© National Instruments Corporation
DAC1 Direct Data Register
The DAC1 Direct Data Register loads the desired data directly into DAC1, without using the
DAC data FIFO.
Address: Base address + 1A (hex)
Type: Write-only
Word Size: 16-bit
Bit Map:
Bit Name Description
15–0 D<15..0> Data bits 15 through 0—The data to be written directly
to DAC1. This data is interpreted in straight binary form
when DAC1 is configured for unipolar operation. In
unipolar mode, the valid range is 0 to 65,536 for a 16-bit
DAC and 0 to 4,096 for a 12-bit DAC. When DAC1 is
configured for bipolar operation, the data is interpreted in
two’s complement form. In bipolar mode, the valid range
is –32,768 to 32,767 for a 16-bit DAC and –2,048 to 2,047
for a 12-bit DAC.
15 14 13 12 11 10 9 8
D15 D14 D13 D12 D11 D10 D9 D8
7 6 5 4 3 2 1 0
D7 D6 D5 D4 D3 D2 D1 D0

National Instruments PCI E Series Specifications

General

Brand	National Instruments
Model	PCI E Series
Category	I/O Systems
Language	English