upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 324
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upd70f3017ay
Manufacturer Part Number
upd70f3017ay
Description
V850/sa1tm 32-/16-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD70F3017AY.pdf
(492 pages)
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(7) Interrupt request flag (ADIF)
324
The interrupt request flag (ADIF) is not cleared even if the contents of the analog input channel specification
register (ADS) are changed.
If the analog input pin is changed during conversion, therefore, the result of the A/D conversion of the preceding
analog input signal and the conversion end interrupt request flag may be set immediately before ADS is rewritten.
If ADIF is read immediately after ADS has been rewritten, it may be set despite the fact that conversion of the
newly selected analog input signal has not been completed yet.
When stopping A/D conversion and then resuming, clear ADIF before resuming conversion.
Remarks 1.
A/D conversion
INTAD
ADCR
2.
Rewriting ADS
(ANIn conversion starts)
Figure 11-7. A/D Conversion End Interrupt Request Generation Timing
n = 0, 1, ..., 11
m = 0, 1, ..., 11
ANIn
CHAPTER 11 A/D CONVERTER
User’s Manual U12768EJ4V1UD
ANIn
ANIn
Rewriting ADS
(ANIm conversion starts)
ANIn
ANIm
ADIF is set but conversion
of ANIm is not completed.
ANIm
ANIm
ANIm
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