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Figure 4-5 Setting ADC Input Port
4.4.1 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.
-
Use Avcc
: Specify Avcc (5V) as a reference voltage.
-
Use inside
: Specify the internal reference voltage (2.56V) as a reference voltage.
-
Use Outside
: Specify voltage issued to Aref as a reference voltage.
4.4.2 Setting ADC Input Port
Analog Input Port has two modes: Level mode and Switch mode.
-
Level mode
: Display voltage from 0 V to a reference voltage in 1,024 steps (“0000” ~
“1023”).
-
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.
