3.3. PHD70 inputs
The PHD70 does not support analog inputs.
The PHD70 has up to 8 digital inputs:
▪ GPIO1 through GPIO8
Digital inputs are typically used to read electrical signals from switches.
The PHD70 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 per detent in the shaft rotation to
be recognized by the PHD70, see chart below for the required waveform.
X2 encoder waveform X4 encoder waveform
All digital and frequency inputs can also be configured as digital inputs with
wake-up functionality.
Additionally, all inputs can be configured as low power outputs. See section 3.4
for more information.
The different configurations are done in software.
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