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7721 Scheda tecnica(PDF) 279 Page - Renesas Technology Corp

Il numero della parte 7721
Spiegazioni elettronici  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  577 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7721 Scheda tecnica(HTML) 279 Page - Renesas Technology Corp

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7721 Group User’s Manual
12–28
A-D CONVERTER
12.9 Precautions for A-D converter
12.9 Precautions for A-D converter
1. Writing to the following must be performed before a trigger occurs (while the A-D converter halts).
•Each bit (except bit 6) of the A-D control register
•Each bit of the A-D sweep pin select register
_____
2. When an external trigger is selected, the AN7/ADTRG pin is disconnected from the comparator. Therefore,
this pin cannot be used as an analog input pin.
When the AN7 pin is selected as an analog input pin while an external trigger is selected, the A-D
converter operates, however, an undefined value is stored into the A-D register 7.
3. Refer to “Appendix. 8 Countermeasure against noise” when using the A-D converter.



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