AT89C5131A-RDTIL datasheet(148/184 Pages) ATMEL

Datenblatt-Suchmaschine für elektronische Bauteile

AT89C5131A-RDTIL Datenblatt(PDF) 148 Page - ATMEL Corporation

Teilenummer	AT89C5131A-RDTIL

Bauteilbeschribung	8-bit Flash Microcontroller with Full Speed USB Device

PDF	184 Pages

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148

AT89C5131A-L

4338F–USB–08/07

Reset

Introduction

The reset sources are: Power Management, Hardware Watchdog, PCA Watchdog and

Reset input.

Figure 72. Reset schematic

Reset Input

The Reset input can be used to force a reset pulse longer than the internal reset con-

trolled by the Power Monitor. RST input has a pull-up resistor allowing power-on reset

by simply connecting an external capacitor to VSS as shown in Figure 73. Resistor value

and input characteristics are discussed in the Section “DC Characteristics” of the

AT89C5131A-L datasheet.

Figure 73. Reset Circuitry and Power-On Reset

Power

Monitor

Hardware

Watchdog

PCA

Watchdog

RST

Internal Reset

RST

VCC

To internal reset

RST

VSS

b. Power-on Reset

a. RST input circuitry

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