1 setting reference, 2 setting adc input port – SENA Rhio232 User Manual
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Figure 3-5 Setting ADC Input Port
3.4.1 Setting Reference
Specify a reference voltage for analog input data. Rhio represents voltage from 0 V to a
reference voltage in 1,024 steps. A reference voltage may not exceed 5 V. Specify a reference
voltage in the Reference list box.
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Use Avcc: Specify Avcc (5V) as a reference voltage.
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Use inside: Specify the internal reference voltage (2.56V) as a reference voltage.
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Use Outside : Specify voltage issued to Aref as a reference voltage.
3.4.2 Setting ADC Input Port
Analog Input Port has two modes: Level mode and Switch mode.
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Level mode: Display voltage from 0 V to a reference voltage in 1,024 steps (“0000” ~
“1023”).
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Switch mode: Compare input voltage level to threshold level setting and send a state
change response when the input level is higher or lower than the threshold. An ADC
input recognizes it is changed only when it is changed larger than 8 steps from the pre-
configured threshold.