Measurement Computing PCI-DAS6023 - Manual (Page 19)

PCI-DAS6023 and PCI-DAS6025 User's Guide Functional Details
19
Auxiliary I/O signals
I/O type Signal name Function
AUXIN<5:0> sources
(software selectable) A/D CONVERT External ADC convert strobe (default)
A/D EXT. TIMEBASE IN External ADC pacer time base
A/D START TRIGGER ADC Start Trigger (default)
A/D STOP TRIGGER ADC Stop Trigger (default)
A/D PACER GATE External ADC gate (default)
D/A START TRIGGER DAC trigger/gate (default) (PCI-DAS6025 only)
D/A UPDATE DAC update strobe (default) (PCI-DAS6025 only)
D/A EXT. TIMEBASE IN External DAC pacer time base (PCI-DAS6025 only)
AUXOUT<2:0> sources
(software selectable) STARTSCAN A pulse indicating start of conversion
SSH Active signal that terminates at the start of the last
conversion in a scan.
A/D STOP Indicates end of an acquisition sequence
A/D CONVERT ADC convert pulse (default)
SCANCLK Delayed version of ADC convert (default)
CTR1 CLK CTR1 clock source
D/A UPDATE D/A update pulse (default) (PCI-DAS6025 only)
CTR2 CLK CTR2 clock source
A/D START TRIGGER ADC Start Trigger Out
A/D STOP TRIGGER ADC Stop Trigger Out
D/A START TRIGGER DAC Start Trigger Out
Default selections
summary AUXIN0 A/D CONVERT
AUXIN1 A/D START TRIGGER
AUXIN2 A/D STOP TRIGGER
AUXIN3 D/A UPDATE (PCI-DAS6025 only)
AUXIN4 D/A START TRIGGER (PCI-DAS6025 only)
AUXIN5 A/D PACER GATE
AUXOUT0 D/A UPDATE (PCI-DAS6025 only)
AUXOUT1 A/D CONVERT
AUXOUT2 SCANCLK
DAQ-Sync signals
The DAQ-Sync hardware provides the capability of triggering or clocking up to four slave boards from a master
board to synchronize data input and / or output.
The PCI-DAS6023 and PCI-DAS6025 boards provide the capability of inter-board synchronization with other
boards in the PCI-DAS6000 family. There are five trigger/strobes and a synchronizing clock provided on a 14-
pin header connector. The available signals are:

DS A/D START TRIGGER
 DS A/D STOP TRIGGER
 DS A/D CONVERT
 DS D/A UPDATE (PCI-DAS6025 only)
 DS D/A START TRIGGER (PCI-DAS6025 only)
 SYNC CLK
Except for the SYNC CLK signal, the DAQ-Sync timing and control signals are a subset of the AUXIO signals
available at the 100-pin I/O connector. These versions of the signals are used for board-to-board
synchronization and have the same timing specifications as their I/O connector counterparts. Refer to the " DAQ
signal timing " section on page 21 for explanations of signals and timing.