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M16C/5L Group, M16C/56 Group
24.4
Operational Modes
24.4.1
One-Shot Mode
In one-shot mode, the analog voltage applied to a selected pin is converted to a digital code once.
Table 24.7 lists One-Shot Mode Specifications.
Table 24.7
One-Shot Mode Specifications
Item
Function
A/D conversion start
conditions
A/D conversion stop
conditions
Interrupt request generation
timing
Analog input pin
Reading of A/D conversion
result
R01UH0127EJ0110 Rev.1.10
Sep 01, 2011
Bits CH2 to CH0 in the ADCON0 register and bits ADGSEL1 to ADGSEL0
in the ADCON2 register are used to select a pin. The analog voltage
applied to the pin is converted to a digital code once.
•
When the TRG bit in the ADCON0 register is 0 (software trigger)
the ADST bit in the ADCON0 register is set to 1 (A/D conversion starts).
When the TRG bit is 1 ( ADTRG trigger)
•
the input level at the ADTRG pin changes from high to low after the ADST
bit is set to 1 (A/D conversion start).
•
Completion of A/D conversion (if a software trigger is selected, the ADST
bit becomes 0 (A/D conversion stop)).
•
Set the ADST bit to 0.
Completion of A/D conversion.
Select one pin from AN0 to AN7, AN0_0 to AN0_7, AN2_0 to AN2_7, or
AN3_0 to AN3_2.
Read the register among AD0 to AD7 that corresponds to the selected pin.
Specification
24. A/D Converter
Page 630 of 803
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