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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATtiny25 датащи(PDF) 110 Page - ATMEL Corporation |
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ATtiny25 датащи(HTML) 110 Page - ATMEL Corporation |
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110 / 196 page  110 7598H–AVR–07/09 ATtiny25/45/85 17.3 Analog Comparator Multiplexed Input It is possible to select any of the ADC3..0 pins to replace the negative input to the Analog Com- parator. The ADC multiplexer is used to select this input, and consequently, the ADC must be switched off to utilize this feature. If the Analog Comparator Multiplexer Enable bit (ACME in ADCSRB) is set and the ADC is switched off (ADEN in ADCSRA is zero), MUX1..0 in ADMUX select the input pin to replace the negative input to the Analog Comparator, as shown in Table 17-2. If ACME is cleared or ADEN is set, AIN1 is applied to the negative input to the Analog Comparator. 17.3.1 Digital Input Disable Register 0 – DIDR0 • Bits 1, 0 – AIN1D, AIN0D: AIN1, AIN0 Digital Input Disable When this bit is written logic one, the digital input buffer on the AIN1/0 pin is disabled. The corre- sponding PIN Register bit will always read as zero when this bit is set. When an analog signal is applied to the AIN1/0 pin and the digital input from this pin is not needed, this bit should be writ- ten logic one to reduce power consumption in the digital input buffer. Table 17-2. Analog Comparator Multiplexed Input ACME ADEN MUX1..0 Analog Comparator Negative Input 0x xx AIN1 11 xx AIN1 10 00 ADC0 10 01 ADC1 10 10 ADC2 10 11 ADC3 Bit 765 4321 0 – – ADC0D ADC2D ADC3D ADC1D AIN1D AIN0D DIDR0 Read/Write R R R/W R/W R/W R/W R/W R/W Initial Value 000 0000 0 |
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