SkyWave IDP-782, Hardware Manual, Page: 29 / 87

IDP-782 - Hardware Guide
I/O 04 provides dedicated overcurrent/short circuit protection circuitry when operated in the open drain,
switch-to-ground mode. The other I/Os do not have this circuitry therefore I/O 04 is recommended for
applications requiring overcurrent/short circuit protection.
Simplified block diagrams of the I/O when configured as digital inputs, digital outputs, and analog inputs
are shown in the figures below (Figure 10, Figure 11, and Figure 12).
The terminal also supports two dedicated outputs (Output05 and Output06). More information on these
outputs can be found in section 3.4.4.
3.4.1 Digital Input
Figure 10 shows a schematic of the I/O when configured as a digital input.
Figure 10: Digital Input
Input Type S1 S2 S3
With weak pull-down Open Open
-
With pull-down Open Closed
-
With pull-up Closed Open
-
Ignition - - Closed
The input specifications are provided in the table below.
T213, Version 02
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