UPD78F9418A NEC, UPD78F9418A Datasheet - Page 150

• Manufacturer Part Number: UPD78F9418A
• Description: (UPD7894xxA) 8-Bit Single Chip Microcontrollers
• Manufacturer: NEC

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(6)
Figure 10-8. Conversion Result Readout Timing (When Conversion Result Is Undefined Value)
Noise elimination
To maintain a resolution of 8 bits, it is necessary to avoid noise at the AV
higher the output impedance of the analog input source, the larger the effect by noise. To eliminate noise,
attach an external capacitor to the relevant pins as shown in Figure 10-10.
Figure 10-9. Conversion Result Readout Timing (When Conversion Result Is Normal Value)
ADCR0
INTAD0
ADCS0
INTAD0
ADCS0
ADCR0
Normal conversion result read out
A/D conversion end
A/D conversion end
A/D operation stopped
User’s Manual U13952EJ3V0UD
Normal conversion result
Normal conversion result
A/D operation stopped
Normal conversion
A/D conversion end
result read out
Undefined value
REF
value read out
and ANI0 to ANI6 pins. The
Undefined