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ATMEGA8535 датащи(PDF) 37 Page - ATMEL Corporation |
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ATMEGA8535 датащи(HTML) 37 Page - ATMEL Corporation |
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37 / 321 page ![]() 37 ATmega8535(L) 2502K–AVR–10/06 Figure 15. Reset Logic Notes: 1. Values are guidelines only. 2. The Power-on Reset will not work unless the supply voltage has been below VPOT (falling). Table 15. Reset Characteristics Symbol Parameter Condition Min (1) Typ (1) Max (1) Units VPOT Power-on Reset Threshold Voltage (rising) 1.4 2.3 V Power-on Reset Threshold Voltage (falling)(2) 1.3 2.3 V VRST RESET Pin Threshold Voltage 0.2 0.9 V tRST Minimum pulse width on RESET Pin 1.5 µs VBOT Brown-out Reset Threshold Voltage(3) BODLEVEL = 1 2.5 2.7 2.9 V BODLEVEL = 0 3.6 4.0 4.2 tBOD Minimum low voltage period for Brown-out Detection BODLEVEL = 1 2 µs BODLEVEL = 0 2 µs V HYST Brown-out Detector hysteresis 130 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 Watchdog Oscillator SUT[1:0] Power-on Reset Circuit Reset Circuit Watchdog Timer |
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