UPD17708 datasheet(113/356 Pages) NEC

Nome de Peças	UPD17708

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

PDF	356 Pages

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Fabricante Electrônico	NEC [NEC]

Página de início	http://www.nec.com/

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113

µPD17704, 17705, 17707, 17708, 17709

11.3 General-Purpose Input Port (P0D, P1A, P1C)

11.3.1 Configuration of input port

The following paragraphs (1) and (2) show the configuration of the input port.

(1) P0D (P0D3, P0D2, P0D1, P0D0)

Note

This is an internal signal output on execution of the clock stop instruction, and its circuit is

designed not to increase the current consumption due to noise even if the pin is floated.

(2) P1A (P1A3, P1A2, P1A1, P1A0)

P1C (P1C3, P1C2, P1C1, P1C0)

Note

This is an internal signal output on execution of the clock stop instruction, and its circuit is

designed not to increase the current consumption due to noise even if the pin is floated. (Except

P1A3, P1A2, P1A0)

VDD

Write instruction

Read instruction

Port register

(1 bit)

CKSTOP Note

P0DPLD flag

High-ON resistance

Input latch

To A/D converter

VDD

To frequency counter or A/D converter

Write instruction

Read instruction

Port register

(1 bit)

CKSTOP Note

UPD17708 Folha de dados(PDF) 113 Page - NEC