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ATmega16M1 Datasheet(PDF) 48 Page - ATMEL Corporation |
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ATmega16M1 Datasheet(HTML) 48 Page - ATMEL Corporation |
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48 / 365 page ![]() 48 7647F–AVR–04/09 ATmega16/32/64/M1/C1 Figure 7-2. MCU Start-up, RESET Tied to V CC Figure 7-3. MCU Start-up, RESET Extended Externally 7.2.2 External Reset An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the minimum pulse width (see Table 7-1) will generate a reset, even if the clock is not running. Shorter pulses are not guaranteed to generate a reset. When the applied signal reaches the Reset Threshold Voltage – V RST – on its positive edge, the delay counter starts the MCU after the Time-out period – t TOUT – has expired. Figure 7-4. External Reset During Operation RESET TIME-OUT INTERNAL RESET tTOUT VRST V VCC CCRR V V PORMIN PORMAX RESET TIME-OUT INTERNAL RESET t TOUT V POT V RST VCC CC |
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