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M16C/64C Group
27.4
Operational Modes
27.4.1
One-Shot Mode
In one-shot mode, the analog voltage applied to a selected pin is converted to a digital code once.
Table 27.8 lists One-Shot Mode Specifications.
Table 27.8
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
R01UH0092EJ0110 Rev.1.10
Jul 31, 2012
Bits CH2 to CH0 in the ADCON0 register and bits ADGSEL1 to ADGSEL0
in the ADCON2 register, or bits ADEX1 to ADEX0 in the ADCON1 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,
ANEX0, or ANEX1.
Read the register among AD0 to AD7 that corresponds to the selected pin.
Specification
27. A/D Converter
Page 632 of 807
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