User manual

13-2 Digital I/O Port, Output Enable, & Output Configuration 2400 Series SourceMeter
®
User’s Manual
Digital I/O port
The SourceMeter has a digital input/output port that can be used to control exter-
nal digital circuitry, such as a handler that is used to perform binning operations
when testing limits.
NOTE The Model 2401 does not use the digital output lines of the Digital I/O
port. If using the Model 2401, ignore all information that pertains to
binning operations.
Port configuration
The Digital I/O Port is located on the rear panel and is shown in Figure 13-1.
NOTE The four digital output lines and the SOT line are primarily intended for
limit testing with a device handler. See
Section 12, “Limit Testing,” for
details on performing limit tests and interfacing to handlers and
Section 11, “Triggering,” for information on programming the
SourceMeter to respond to the start-of-test (SOT) pulse from a handler.
NOTE The Model 2401 does not use pins 1 through 4 of the Digital I/O port. If
using the Model 2401, ignore all information and actions pertaining to the
digital output lines.
Figure 13-1
Digital I/O port
ONLY.
ONLY.
D RATING.
D RATING.
OUTPUT
ENABLE
SourceMeter
15
69
1 = Digital Output #1
2 = Digital Output #2
3 = Digital Output #3
4 = Digital Output #4 (or EOT, /EOT, BUSY, /BUSY)
5 = Ground
6 = Trigger Input (SOT)
7 = +5V
8 = /Output Enable (/OE)
9 = Ground
Connector may be marked
DIGITAL I/O on some units