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ATmega324P Scheda tecnica(PDF) 331 Page - ATMEL Corporation |
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ATmega324P Scheda tecnica(HTML) 331 Page - ATMEL Corporation |
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331 / 377 page ![]() 331 7674F–AVR–09/09 ATmega164P/324P/644P 26.3 Clock Characteristics 26.3.1 External Clock Drive Waveforms Figure 26-2. External Clock Drive Waveforms 26.3.2 External Clock Drive Note: 1. Values indicated represent typical data from design simulation. Table 26-2. Calibration Accuracy of Internal RC Oscillator Frequency VCC Temperature Calibration Accuracy Factory Calibration 8.0 MHz 3V 25 ° C±2% 2.7V - 5.5V -40 ° C - 125° C ±14% VIL1 VIH1 Table 26-3. External Clock Drive (1) Symbol Parameter VCC=2.7-5.5V VCC=4.5-5.5V Units Min. Max. Min. Max. 1/tCLCL Oscillator Frequency 08 0 16 MHz tCLCL Clock Period 125 62.5 ns tCHCX High Time 50 25 ns tCLCX Low Time 50 25 ns tCLCH Rise Time 1.6 0.5 µs tCHCL Fall Time 1.6 0.5 µs Δt CLCL Change in period from one clock cycle to the next 22 % |
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