Debug GPIO channels are timestamped digital signal lines connecting the target
application to a host computer visualization application. They are typically used to
plot low-frequency events on a time axis, such as when given Application state
transitions occur.
The figure below shows the monitoring of the Digital state of a mechanical switch
connected to a debug GPIO in MPLAB Data Visualizer.Figure 4-2. Monitoring Debug GPIO with
MPLAB Data Visualizer
Debug GPIO channels are timestamped, so the resolution of DGI GPIO events is determined
by the resolution of the DGI Timestamp module.
Important: Although signal
bursts of higher frequency can be captured, the frequency range of signals for which
debug GPIO can be used is up to about 2 kHz. Attempting to capture signals above
this frequency will result in data saturation and overflow, which may cause the DGI
session to be aborted.
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