upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 321
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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(2) A/D conversion by software start
A/D conversion
If bit 6 (TRG) of A/D converter mode register 1 (ADM1) is set to 0 and bit 7 (ADCS) is set to 1, the A/D converter
starts converting the voltage applied to the analog input pin specified by the analog input channel specification
register (ADS) into a digital signal.
When A/D conversion has been completed, the result of the conversion is stored in the A/D conversion result
register (ADCR), and an interrupt request signal (INTAD) is generated. Once A/D conversion has been started
and completed, the next conversion is started immediately. A/D conversion is repeated until new data is written to
ADS.
If ADS is rewritten during A/D conversion, the conversion under execution is stopped, and conversion of the newly
selected analog input channel is started.
If data with ADCS set to 0 is written to ADM during A/D conversion, the conversion is immediately stopped.
Remarks 1.
INTAD
ADCR
Rewriting ADS
ADCS = 1, TRG = 0
2.
n = 0, 1, ..., 11
m = 0, 1, ..., 11
ANIn
Figure 11-5. A/D Conversion by Software Start
CHAPTER 11 A/D CONVERTER
User’s Manual U12768EJ4V1UD
ANIn
ANIn
Rewriting ADS
ADCS = 1, TRG = 0
Conversion stopped.
Conversion result
does not remain.
ANIn
ANIn
ANIm
ANIm
ADCS = 0
ANIm
Stopped
321
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