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12.7.2 Scan mode operation (external trigger scan)
In this mode, the analog inputs specified by the ADM0 register are selected sequentially from the ANI0 pin using
the ADTRG signal as a trigger, and A/D converted. The A/D conversion results are stored in the ADCRn register
corresponding to the analog input (n = 0 to 7).
When the lower 4 channels (ANI0 to ANI3) of the analog input are set by the ADM0 register so that they are
scanned, the A/D conversion end interrupt (INTAD) is generated when the number of A/D conversions specified have
ended, and A/D conversion is stopped.
When the higher 4 channels (ANI4 to ANI7) of the analog input are set by the ADM0 register so that they are
scanned, after the conversion of the lower 4 channels is ended, the mode is shifted to the A/D trigger mode, and the
remaining A/D conversions are executed. The conversion results are stored in the ADCRn register corresponding to
the analog input (n = 0 to 7).
Trigger
ADTRG signal
ADTRG signal
ADTRG signal
ADTRG signal
(A/D trigger mode)
When the conversion of all the specified analog inputs has ended, the INTAD interrupt is generated and A/D
conversion is stopped.
When a trigger is input to the ADTRG pin while the ADCE bit of the ADM0 register is 1, A/D conversion is started
again.
This is most appropriate for applications in which multiple analog inputs are constantly monitored.
CHAPTER 12
Analog Input
A/D Conversion Result Register
ANI0
ADCR0
ANI1
ADCR1
ANI2
ADCR2
ANI3
ADCR3
ANI4
ADCR4
ANI5
ADCR5
ANI6
ADCR6
ANI7
ADCR7
User's Manual U14359EJ4V0UM
A/D CONVERTER
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