CHAPTER 11 A/D CONVERTER
User’s Manual U12688EJ4V0UM00
330
(2) 4-buffer mode (A/D trigger select: 4-buffer)
One analog input is A/D converted four times and the results are stored in the four ADCR0 to ADCR3
registers. When four A/D conversions end, an INTAD interrupt is generated and A/D conversion terminates.
Analog Input
A/D Conversion Result Register
ANIn
ADCR0
ANIn
ADCR1
ANIn
ADCR2
ANIn
ADCR3
(n = 0 to 7)
If 1 is written in the CE bit of the ADM0 register, A/D conversion can be restarted.
This is most appropriate for applications that determine the average A/D conversion results.
Figure 11-7. Example of 4-Buffer Mode (A/D Trigger Select 4-Buffer) Operation
ANI0
ANI1
ANI2
ANI3
ANI4
ANI5
ANI6
ANI7
ADCR0
ADCR1
ADCR2
ADCR3
ADCR4
ADCR5
ADCR6
ADCR7
A/D converter
ADM0
(
×
4)
(
×
4)
(1)
CE bit of ADM0 is set to 1 (enable)
(6)
ANI4 A/D conversion
(2)
ANI4 A/D conversion
(7)
Conversion result is stored in ADCR2
(3)
Conversion result is stored in ADCR0
(8)
ANI4 A/D conversion
(4)
ANI4 A/D conversion
(9)
Conversion result is stored in ADCR3
(5)
Conversion result is stored in ADCR1
(10) INTAD interrupt generation
Содержание V850E/MS1 UPD703100
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