Model 2450 Interactive SourceMeter® Instrument Reference Manual
Section 6: SCPI command reference
2450-901-01 Rev. B/September 2013
6-19
DIGital subsystem
The commands in the DIGital subsystem control the digital I/O lines.
:DIGital:LINE<n>:MODE
This command sets the digital I/O line to be a digital line or trigger model line and sets the line as an input, output,
or open-drain. You can also use this attribute to configure synchronous triggering modes.
Type
Affected by
Where saved
Default value
Command and query
Recall settings
Instrument reset
Power cycle
Save settings
DIG, IN
Usage
:DIGital:LINE<n>:MODE <triggerType>, <lineState>
:DIGital:LINE<n>:MODE?
<n>
The digital I/O line (1 to 6)
<triggerType>
Sets the digital line configuration type; the options are:
•
Allow direct digital control of the line (not used by trigger model):
DIGital
•
Configure for trigger control:
TRIGger
•
Configure as a synchronous master or acceptor:
SYNChronous
<lineState>
The line state; see
Details
for values
Details
Set
<lineState>
to one of the values shown in the following table.
Value
Description
IN
Detects falling-edge, rising-edge, or either-edge triggers as input.
OUT
Generates a positive or negative edge for output when requested.
OPENdrain
Configures the line to be an open-drain signal (makes the line a digital open-drain
line with 100 k
Ω
pull-up resistor). When used with
<triggerType>
set to
TRIGger
, this values uses the edge setting as
IN
.
ACCeptor
Use this value only with the
SYNChronous
trigger type. This value detects a
falling-edge as an input trigger and automatically latches and drives the trigger line
low. Asserting the output trigger releases the latched line. Detects a falling-edge
input pulse.
MASTer
Use this value only with the
SYNChronous
trigger type. This value detects a
rising-edge triggers as an input. Asserts a TTL-low pulse for output. Detects a
rising-edge input pulse.
Example
:DIG:LINE1:MODE DIG, OUT
Set digital I/O line 1 as a digital output line.
Also see
(on page 3-62)
