Keithley 2635 Reference Manual

2600S-901-01 Rev. C / January 2008 Return to Section Topics 10-5
Series 2600 System SourceMeter® Instruments Reference Manual Section 10: Digital I/O and Triggering
Digital I/O bit weighting
Bit weighting for the digital I/O lines is shown in Table 10-1.
Table 10-1
Digital I/O bit weighting
Line # Bit
Decimal
weighting
Hexadecimal
weighting
1
2
3
4
5
6
7
8
9
10
11
12
13
14
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
0x0001
0x0002
0x0004
0x0008
0x0010
0x0020
0x0040
0x0080
0x0100
0x0200
0x0400
0x0800
0x1000
0x2000
Setting digital I/O values
To set digital I/O values:
1. Press the MENU > DIGOUT, and then press ENTER or push in the navigation wheel.
2. Select DIG-IO-OUTPUT, and then press ENTER of the navigation wheel.
3. Set the decimal value as required to set digital I/O line(s) within the range of 0 to 16,383
(see
Table 10-1), then press ENTER or the navigation wheel.
4. Press EXIT as needed to return to the normal display.
Write protecting digital I/O lines
You can also write protect specific digital I/O lines to prevent their values from being changed:
1. Press MENU > DIGOUT and then press ENTER or the navigation wheel.
2. Select WRITE-PROTECT, then press ENTER or the navigation wheel.
3. Set the decimal value as required to write protect digital I/O line(s) within the range of 0 to
16,383 (see
Table 10-1), then press ENTER or the navigation wheel.
4. Press EXIT as needed to return to the normal display.
5. To remove write protection, simply repeat the above procedure, entering the same value.
Remote digital I/O commands
Commands that control and access the digital I/O port are summarized in Table 10-2. See
Section 12 for complete details on these commands. See Table 10-1 for decimal and hexadecimal
values used to control and access the digital I/O port and individual lines.

Keithley 2635 Specifications

General

Brand	Keithley
Model	2635
Category	Measuring Instruments
Language	English