UPD78F0138 NEC, UPD78F0138 Datasheet - Page 253

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

(8) AV
(9) AV
(10) A/D converter mode register (ADM)
(11) Analog input channel specification register (ADS)
(12) Power-fail comparison mode register (PFM)
(13) Power-fail comparison threshold register (PFT)
This pin inputs an analog power/reference voltage to the A/D converter. Always use this pin at the same potential
as that of the V
The signal input to ANI0 to ANI7 is converted into a digital signal, based on the voltage applied across AV
AV
In the standby mode, the current flowing through the series resistor string can be reduced by lowering the voltage
input to the AV
This is the ground potential pin of the A/D converter. Always use this pin at the same potential as that of the V
pin even when the A/D converter is not used.
This register is used to set the conversion time of the analog input signal to be converted, and to start or stop the
conversion operation.
This register is used to specify the port that inputs the analog voltage to be converted into a digital signal.
This register is used to set the power-fail monitor mode.
This register is used to set the threshold value that is to be compared with the value of the A/D conversion result
register (ADCR).
REF
SS
SS
.
pin
pin
REF
DD
pin even when the A/D converter is not used.
pin to the AV
SS
level.
CHAPTER 12 A/D CONVERTER
User’s Manual U16228EJ2V0UD
REF
253
and
SS