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M16C/64A Group
27.4.3
Single Sweep Mode
In single sweep mode, the analog voltage applied to selected pins is converted one-by-one to a digital
code. Table 27.12 lists the Single Sweep Mode Specifications.
Table 27.12
Single Sweep 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
R01UH0136EJ0210 Rev.2.10
Jul 31, 2012
Bits SCAN1 to SCAN0 in the ADCON1 register and bits ADGSEL1 to
ADGSEL0 in the ADCON2 register are used to select pins. The analog
voltage applied to the pins is converted one-by-one to a digital code.
•
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 start).
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 is set to 0 (A/D conversion stop)).
•
Set the ADST bit to 0.
Completion of A/D conversion
Select one of the following groupings from AN0 to AN7:
2 pins: AN0 and AN1
4 pins: AN0 to AN3
6 pins: AN0 to AN5
8 pins: AN0 to AN7
AN0_0 to AN0_7 and AN2_0 to AN2_7 can also be selected in the same
way.
Read the registers among AD0 to AD7 that corresponds to the selected pin.
Specification
27. A/D Converter
Page 636 of 800
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