UPD784938 Datasheet, PDF (415/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 16 A/D CONVERTER
16.4.2 Select mode
One analog input is specified by bits 1 to 3 (ANIS0 to ANIS2) of the A/D converter mode register (ADM), and A/D
conversion of the specified analog input pin is started. The conversion result is stored in the A/D conversion result register
(ADCR). An A/D conversion end interrupt request (INTAD) is generated at the end of each conversion operation.
Figure 16-8. Select Mode Operation Timing
(a) TRG bit ← 0
A/D conversion
ANI3
Conversion start
( CS ← 1
MS ← 1
ANIS2 to ANIS0 ← 011
ADCR
ANI3
ANI3
ANI3
ANI3
ANI3
ANI3
ANI3
ANI3
ANI3
ANI3
INTAD
(b) TRG bit ← 1
INTP5
Initialization
A/D conversion
ANI0
Initialization
ANI0 ANI0
ANI0
Initialization
ANI0
ANI0
ANI0
Conversion start Conversion end
( CS ← 1
MS ← 1
ANIS2 to ANIS0 ← 000
Conversion end Conversion end
Conversion end Conversion end
ADCR
INTAD
ANI0
ANI0
ANI0
ANI0
Preliminary User’s Manual U13987EJ1V0UM00
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