UPD17708 datasheet(197/356 Pages) NEC

Teilenummer	UPD17708

Bauteilbeschribung	4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DEDICATED HARDWARE FOR DIGITAL TUNING SYSTEM

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Hersteller	NEC [NEC]

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197

µPD17704, 17705, 17707, 17708, 17709

Figure 14-5. Configuration of A/D Converter Mode Selection Register

Notes 1. A/D conversion under execution is stopped if “0” is written to this bit.

2. A/D operation is started in the hardware mode when “1” is written to this bit. In the software mode,

operation is started as soon as data has been written (by the PUT instruction) to the A/D converter

reference voltage setting register (ADCR).

Name

Flag symbol

Address

25H

Read/Write

R/W

A/D converter mode selection

Power-ON reser

WDT&SP reser

CE reser

Clock stop

R:Retained

VADCIN < VADCREF

VADCIN > VADCREF

Detects result of comparison by A/D converter

End of conversion

Conversion in progress

Software modeNote 1

Hardware modeNote 2

Detects operating status of A/D converter in hardware mode

Selects compare mode of A/D converter and starts or stops A/D converter

Fixed to “0”

UPD17708 Datenblatt(PDF) 197 Page - NEC