NEC Renesas V850/SC1 User Manual page 472

(7) ADCV pin
DD
The ADCV pin is the power supply pin of the analog circuit, and also supplies power to the input circuit of ANI0
DD
to ANI11. Even in an application where a back-up power supply is used, therefore, be sure to apply the same
voltage as the V pin to the ADCV
DD0
(8) Reading out A/D converter result register (ADCR)
Writing to A/D converter mode register 1 (ADM1) and the analog input channel specification register (ADS) may
cause the ADCR contents to be undefined. Therefore, read the conversion result during A/D conversion (ADCS
= 1). Incorrect conversion results may be read if the timing is other than the above.
470
CHAPTER 12
pin as shown below.
DD
Figure 12-8. Handling of ADCV
Main power supply
User's Manual U15109EJ3V0UD
A/D CONVERTER
Pin
DD
V
DD0
ADCV
Back-up
capacitor
GND0
ADCGND
DD