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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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ATmega128 Datenblatt(PDF) 51 Page - ATMEL Corporation |
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ATmega128 Datenblatt(HTML) 51 Page - ATMEL Corporation |
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51 / 386 page  51 2467S–AVR–07/09 ATmega128 Figure 22. Reset Logic Notes: 1. The Power-on Reset will not work unless the supply voltage has been below VPOT (falling) Table 19. Reset Characteristics Symbol Parameter Condition Min Typ Max Units VPOT Power-on Reset Threshold Voltage (rising) 1.4 2.3 V Power-on Reset Threshold Voltage (falling) (1) 1.3 2.3 V VRST RESET Pin Threshold Voltage 0.2 V CC 0.85 V CC V tRST Pulse width on RESET Pin 1.5 µs VBOT Brown-out Reset Threshold Voltage(2) BODLEVEL = 1 2.4 2.6 2.9 V BODLEVEL = 0 3.7 4.0 4.5 tBOD Minimum low voltage period for Brown-out Detection BODLEVEL = 1 2 µs BODLEVEL = 0 2 V HYST Brown-out Detector hysteresis 100 mV MCU Control and Status Register (MCUCSR) Brown-Out Reset Circuit BODEN BODLEVEL Delay Counters CKSEL[3:0] CK TIMEOUT DATA BUS Clock Generator SPIKE FILTER Pull-up Resistor JTAG Reset Register Watchdog Oscillator SUT[1:0] Watchdog Timer RESET Pull-up Resistor PEN Reset Circuit L DQ Q Power-On Reset Circuit |
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