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Chapter 14
A/D Converter
Preliminary User’s Manual U14913EE1V0UM00
14.8 Operation in Timer Trigger Mode
The A/D converter can set an interrupt signal as a conversion trigger for up to 12 channels of analog
input (ANI0 to ANI11).
The interrupt signal that can be selected as trigger is the Timer E 0 interrupt INTPE10/TINTCCE10.
14.8.1 Operation in select mode
One analog input (ANI0 to ANI) specified by the ADSCM0 register is A/D converted. The conversion
result is stored in the ADCRm register corresponding to the analog input (m = 0 to 11).
This is optimal for applications that read A/D conversion values synchronized to a trigger.
(1)
Timer trigger select mode
Taking the interrupt signal as a trigger, one analog input at a time is A/D converted and the result is
stored in one ADCRm register. An A/D conversion termination interrupt (INTAD) is generated for
each A/D conversion, which terminates A/D conversion (CS = 0).
After A/D conversion termination, the A/D converter changes to trigger wait status (CE = 1). It per-
forms A/D conversion operation again, when the interrupt signal occurs.
Remark:
m = 0 to 11
Figure 14-13: Example of Timer Trigger Select Mode Operation (ANI4)
Trigger
Analog Input
A/D Conversion Result Register
Timer E 0 Interrupt
ANIm
ADCRm
ANI0
ANI1
ANI2
ANI3
ANI4
ANI5
:
ADCR0
ADCR1
ADCR2
ADCR3
ADCR4
ADCR5
:
ADCR11
A/D converter
INTPE10/TINTCCE10
(1) CE bit of ADSCM0 = 1 (Enabled)
(2) INTPE10/TINTCCE10 interrupt generation
(3) A/D conversion of ANI4
(4) Store conversion result in ADCR4
(5) INTAD interrupt generation
ANI11
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