Keithley 2450 Reference Manual page 212

Model 2450 Interactive SourceMeter® Instrument Reference Manual
Digital I/O programming example
The programming commands below illustrate how to set bit B1 of the digital I/O port high, and then
read the value.
Using SCPI commands:
:DIGital:LINE1:MODE DIGital, OUT
:DIGital:LINE1:STATe 1
:DIGital:LINE1:MODE DIGital, IN
:DIGital:LINE1:STATe?
Using TSP commands:
-- Set bit B1 high
digio.line[1].mode = digio.MODE_DIGITAL_OUT
digio.line[1].state = digio.STATE_HIGH
-- Read digital I/O port
digio.line[1].mode = digio.MODE_DIGITAL_IN
print(digio.line[1].state)
Digital I/O bit weighting
Bit weighting for the digital I/O lines is shown in the following table.
Line # Bit
1 B1
2 B2
3 B3
4 B4
5 B5
6 B6
2450-901-01 Rev. B/September 2013
Pin Decimal Hexadecimal
1 1 0x01
2 2 0x02
3 4 0x04
4 8 0x08
6 16 0x10
8 32 0x20
Section 3: Functions and features
Binary
000001
000010
000100
001000
010000
100000
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