3.2. PHD50 inputs
The PHD50 has up to 8 analog inputs:
▪ GPIO1 through GPIO8
Analog inputs are typically used to read electrical signals that span a voltage
range.
Analog inputs GPIO1 through GPIO8 can also be configured as digital inputs with
wake-up functionality by programming the voltage threshold in the Lua scripting
tool to make them digital.
Additionally, inputs GPIO2 through GPIO6 can be configured as low power
outputs. See section 3.4 for more information.
The different configurations are done in software.
The PHD50 has 2 frequency inputs:
▪ GPIO9 through GPIO10
The frequency inputs are provided for the uses of a rotary encoder as an input
device. The encoder states must change 4 times, or once per detent in the shaft
rotation to be recognized by the PHD50, see chart below for the required
waveform.
X2 encoder waveform X4 encoder waveform
Both frequency inputs can also be configured as digital inputs.
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