5.4 Multi-purpose inputs and outputs
Acqiris SA230E User's Manual
67
5.4 Multi-purpose inputs and outputs
The multi-purpose I/O connectors may be used for any of the functions shown in the following table:
IO Connector
Functions
Type
Description of signal
Mode /
Option
Notes
Inputs
Disabled
-
IO connector is disabled.
In-AccumulationEnable
Level
This signal controls the execution of the averaging
sequence.
-AVG
IO 1 only
In-TriggerEnable
Level
Digitizer
mode
IO 2 only.
Outputs
Out-AcquisitionActive
Level
Indicates that the acquisition is currently running.
IO2 only
Out-AnalyzerArmed
Level
Indicates that the acquisition is ongoing.
-AVG
IO 3 only
Out-LowLevel
Level
Fixed 'low' level signal for debug purposes.
Out-HighLevel
Level
Fixed 'high' level signal for debug purposes.
Table 5.3
- List of signals selectable for the programmables I/Os .
The list of Available signals is indicated (as a comma separated list) by member
IAqMD3ControlIO.AvailableSignals
(IVI.NET) or attribute
AQMD3_ATTR_CONTROL_IO_
AVAILABLE_SIGNALS
(IVI-C).
Signal Logic Levels
The multi-purpose IO signals are 3.3 V CMOS compatible (5V Tolerant buffer). The levels shown in the
table below should be observed.
Direction
Low level
High level
Input
< 0.8 V
> 2.0 to 3.45 V
Output
In the range 0 to 0.8 V
In the range 1.6 to 3.3 V
Table 5.4
- Logic levels.
As an Input
The input is high-impedance and will be pulled high if unconnected via an internal weak pull-up (10 k
pull-up resistor).
