UPD178002 datasheet(18/48 Pages) NEC

Part #	UPD178002

Description	8-BIT SINGLE-CHIP MICROCONTROLLERS

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Manufacturer	NEC [NEC]

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18

µPD178002, 178003

Data Sheet U12628EJ3V0DS00

5.5 A/D Converter

An A/D converter consisting of three 8-bit resolution channels is incorporated.

The following two A/D conversion operation start-up methods are available.

• Hardware start

• Software start

Figure 5-5. A/D Converter Block Diagram

Tap

selector

INTAD

VDD

Internal bus

GND

A/D conversion

result register (ADCR)

Control

circuit

Successive approximation

register (SAR)

ANI0/P10

ANI1/P11

ANI2/P12

Selector

Sample & hold circuit

Voltage comparator

Resistor string

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