NEC mPD784225 Series User Manual page 248

(8) Bit 0 (ADCE) of A/D converter mode register (ADM)
Setting ADCE to 1, allows the value of the first A/D conversion immediately after A/D conversion operation start
to be used.
(9) Conversion results immediately after A/D conversion is started
If bit 7 (ADCS0) of the A/D converter mode register (ADM) is set to 1 without setting bit 0 (ADCE) to 1, the value
of the first A/D conversion is undefined immediately after the A/D conversion operation starts. Poll the A/D
conversion end interrupt reuest (INTAD) and take measures such as discarding the first conversion result.
Figure 13-17. Conversion Results Immediately After A/D Conversion Is Started
ADCR
INTAD
ADCS
A/D startup
248
CHAPTER 13 A/D CONVERTER
A/D conversion end A/D conversion end
Undefined value
Dummy
User's Manual U12697EJ3V0UM
A/D conversion end
Normal conversion result
Reading of conversion result