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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ATmega16A 데이터시트(PDF) 205 Page - ATMEL Corporation |
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ATmega16A 데이터시트(HTML) 205 Page - ATMEL Corporation |
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205 / 352 page  205 8154B–AVR–07/09 ATmega16A If ACME is cleared or ADEN is set, AIN1 is applied to the negative input to the Analog Comparator. 21.2 Register Description 21.2.1 SFIOR – Special Function IO Register • Bit 3 – ACME: Analog Comparator Multiplexer Enable When this bit is written logic one and the ADC is switched off (ADEN in ADCSRA is zero), the ADC multiplexer selects the negative input to the Analog Comparator. When this bit is written logic zero, AIN1 is applied to the negative input of the Analog Comparator. For a detailed description of this bit, see “Analog Comparator Multiplexed Input” on page 204. 21.2.2 ACSR – Analog Comparator Control and Status Register • Bit 7 – ACD: Analog Comparator Disable When this bit is written logic one, the power to the Analog Comparator is switched off. This bit can be set at any time to turn off the Analog Comparator. This will reduce power consumption in active and Idle mode. When changing the ACD bit, the Analog Comparator Interrupt must be disabled by clearing the ACIE bit in ACSR. Otherwise an interrupt can occur when the bit is changed. Table 1. Analog Comparator Multiplexed Input ACME ADEN MUX2:0 Analog Comparator Negative Input 0 x xxx AIN1 1 1 xxx AIN1 1 0 000 ADC0 1 0 001 ADC1 1 0 010 ADC2 1 0 011 ADC3 1 0 100 ADC4 1 0 101 ADC5 1 0 110 ADC6 1 0 111 ADC7 Bit 7 6 5 4 3 2 1 0 ADTS2 ADTS1 ADTS0 – ACME PUD PSR2 PSR10 SFIOR Read/Write R/W R/W R/W R R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 Bit 765 432 10 ACD ACBG ACO ACI ACIE ACIC ACIS1 ACIS0 ACSR Read/Write R/W R/W R R/W R/W R/W R/W R/W Initial Value 0 0 N/A 0 0 0 0 0 |
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