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ATmega16 датащи(PDF) 209 Page - ATMEL Corporation |
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ATmega16 датащи(HTML) 209 Page - ATMEL Corporation |
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209 / 357 page ![]() 209 2466S–AVR–05/09 ATmega16(L) Figure 103. ADC Timing Diagram, Auto Triggered Conversion Figure 104. ADC Timing Diagram, Free Running Conversion Differential Gain Channels When using differential gain channels, certain aspects of the conversion need to be taken into consideration. Differential conversions are synchronized to the internal clock CK ADC2 equal to half the ADC clock. This synchronization is done automatically by the ADC interface in such a way that the sample-and-hold occurs at a specific phase of CK ADC2. A conversion initiated by the user (i.e., all Table 81. ADC Conversion Time Condition Sample & Hold (Cycles from Start of Conversion) Conversion Time (Cycles) First conversion 13.5 25 Normal conversions, single ended 1.5 13 Auto Triggered conversions 2 13.5 Normal conversions, differential 1.5/2.5 13/14 1 2 3 4 5 6 7 8 9 10 11 12 13 MSB of Result LSB of Result ADC Clock Trigger Source ADIF ADCH ADCL Cycle Number 12 One Conversion Next Conversion Conversion Complete Prescaler Reset ADATE Prescaler Reset Sample & Hold MUX and REFS Update 11 12 13 MSB of Result LSB of Result ADC Clock ADSC ADIF ADCH ADCL Cycle Number 12 One Conversion Next Conversion 34 Conversion Complete Sample & Hold MUX and REFS Update |
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