UPD6600AGS datasheet(9/36 Pages) NEC

Datenblatt-Suchmaschine für elektronische Bauteile

UPD6600AGS Datenblatt(PDF) 9 Page - NEC

Teilenummer	UPD6600AGS

Bauteilbeschribung	4-BIT SINGLE-CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION

PDF	36 Pages

Scroll/Zoom	100%

Hersteller	NEC [NEC]

Direct Link	http://www.nec.com/

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9 / 36 page

µPD6124A, 6600A

11. PIN FUNCTIONS

11.1

KI/O PIN (P0)

This is the 8-bit I/O pin for key-scan output. When the control register (P1) is set for the input port, the port can be

used as an 8-bit input pin. When the port is set for the input mode, all of these pins are pulled down to the VSS level

inside the LSI.

At reset (all cleared), the value of I/O mode and output latch becomes undefined.

Figure 11-1. KI/O Pin Organization

KI/O7

KI/O6

KI/O5

KI/O4

KI/O3

KI/O2

KI/O1

KI/O0

P10

P00

(P )

Control register

11.2

KI/O PULL-DOWN RESISTOR CONFIGURATION

V DD

V SS

CMOS

N-ch

Pull-down resistor

Input signal

Output signal

Input/output selection

N-ch

P-ch

When KI/O is set to the input mode, pull-down resistor R is turned on.

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