Rainbow-electronics ATmega128L Uživatelský manuál stáhnout pdf (Strana 220)

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101

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ATmega128(L)

2467B–09/01

Analog Comparator

Multiplexed Input

It is possible to select any of the ADC7..0 pins to replace the negative input to the ana-

log comparator. 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 SFIOR) is set and the ADC is switched off (ADEN in ADCSRA is

zero), MUX2..0 in ADMUX select the input pin to replace the negative input to the Ana-

log Comparator, as shown in

Table 93. If ACME is cleared or ADEN is set, AIN1 is

applied to the negative input to the Analog Comparator.

Table 93. Analog Comparator Multiplexed Input

ACME ADEN MUX2..0 Analog Comparator Negative Input

0xxxxAIN1

11xxxAIN1

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

1 2 ... 215 216 217 218 219 220 221 222 223 224 225 ... 330 331

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