National Instruments AT-MIO-16X - Manual (Page 134)

Chapter 4 Register Map and Descriptions
AT-MIO-16X User Manual 4-38 © National Instruments Corporation
2 CHAN_LAST Channel Last—This bit should be set in
the last entry of the scan sequence loaded
into the channel configuration memory.
More than one occurrence of the
CHAN_LAST bit is possible in the
configuration memory list for the
interval-scanning mode. For example,
there can be multiple scan sequences in
one memory list.
1 CHAN_GHOST Channel Ghost—This bit is used to
synchronize conversion for multiple-rate
channel scanning. When this bit is set in
any channel configuration value, the
conversion occurs on the selected
channel but the value is not saved in the
ADC FIFO. In addition, if the sample
counter is programmed to count samples
from Source 4, conversions with the
CHAN_GHOST bit set are not counted.
When the CHAN_GHOST bit is clear,
conversions occur normally and are
saved in the ADC FIFO.
0 CHAN_DSP Channel DSP—This bit is used to flag
channel data that is to be serially sent
over the RTSI bus to the AT-DSP2200. If
the CHAN_DSP bit is set, the associated
channel conversion data is sent over the
RTSI bus. If CHAN_DSP is clear,
channel conversion data is not sent. The
CHAN_DSP bit has no bearing on
whether or not the channel conversion
data is stored in the ADC FIFO. That is
controlled by the CHAN_GHOST bit.
110 50
111 100
CH_GAIN<2..0> Actual Gain