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AT89C5131A-RDTIL 数据表(PDF) 148 Page - ATMEL Corporation |
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AT89C5131A-RDTIL 数据表(HTML) 148 Page - ATMEL Corporation |
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148 / 186 page  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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