NEC mPD178054 Series User Manual page 131

ANI0/P10
ANI1/P11
ANI2/P12
ANI3/P13
ANI4/P14
ANI5/P15
4
ADS33 ADS32 ADS31 ADS30 ADCS3
Analog input channel
specification register 3 (ADS3)
CHAPTER 10 A/D CONVERTER
Figure 10-1. Block Diagram of A/D Converter
Sample & hold circuit
Successive
approximation
register (SAR)
Controller
A/D conversion result
register 3 (ADCR3)
0 FR32 FR31 FR30 0 0
A/D converter mode
register 3 (ADM3)
Internal bus
User's Manual U15104EJ2V0UD
Voltage comparator
Voltage
Controller
comparator
0 PFEN3 PFCM3 PFHRM3
Power-fail comparison mode
register 3 (PFM3)
V
DD
ADCS3
GND
INTAD3
Power-fail comparison threshold
value register 3 (PFT3)
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