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

No. de pieza AT89C5131A-RDTIL
Descripción Electrónicos  8-bit Flash Microcontroller with Full Speed USB Device
PDF  185 Pages
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Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5131A-RDTIL Datasheet(HTML) 148 Page - ATMEL Corporation

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148
AT89C5131A-L
4338E–USB–06/06
Reset
Introduction
The reset sources are: Power Management, Hardware Watchdog, PCA Watchdog and
Reset input.
Figure 71. 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 72. Resistor value
and input characteristics are discussed in the Section “DC Characteristics” of the
AT89C5131A-L datasheet.
Figure 72. 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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