NEC mPD780852 Series Preliminary User's Manual page 154

ANI0/P10
ANI1/P11
ANI2/P12
ANI3/P13
ANI4/P14
ADS12 ADS11 ADS10
Analog input channel
specification register (ADS1)
Figure 12-2. Power-Fail Detection Function Block Diagram
ANI0/P10
ANI1/P11
ANI2/P12
ANI3/P13
ANI4/P14
154
CHAPTER 12 A/D CONVERTER
Figure 12-1. A/D Converter Block Diagram
Sample & hold circuit
3
ADCS1 FR12 FR11 FR10
Internal bus
A/D converter
PFEN PFCM
Power-fail compare
mode register (PFM)
Internal bus
Preliminary User's Manual U14581EJ3V0UM00
Voltage comparator
Successive
approximation
register (SAR)
Controller
A/D conversion result
register (ADCR1)
A/D converter mode
register (ADM1)
PFCM PFEN
Comparator
Power-fail compare
threshold value
register (PFT)
Series resistor string
AV
REF
AV
SS
INTAD
INTAD