參數(shù)資料
型號: MF280C51-30D
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 30 MHz, MICROCONTROLLER, PQFP44
封裝: QFP-44
文件頁數(shù): 153/176頁
文件大?。?/td> 2962K
代理商: MF280C51-30D
78
2535J–AVR–08/10
ATtiny13
13. Analog Comparator
The Analog Comparator compares the input values on the positive pin AIN0 and negative pin
AIN1. When the voltage on the positive pin AIN0 is higher than the voltage on the negative pin
AIN1, the Analog Comparator output, ACO, is set. The comparator can trigger a separate inter-
rupt, exclusive to the Analog Comparator. The user can select Interrupt triggering on comparator
output rise, fall or toggle. A block diagram of the comparator and its surrounding logic is shown
Figure 13-1. Analog Comparator Block Diagram
ator pin placement.
13.1 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
13-1. If ACME is cleared or ADEN is set, AIN1 is applied to the negative input to the Analog
Comparator.
ACBG
BANDGAP
REFERENCE
ADC MULTIPLEXER
OUTPUT
ACME
ADEN
(1)
Table 13-1.
Analog Comparator Multiplexed Input
ACME
ADEN
MUX1..0
Analog Comparator Negative Input
0x
xx
AIN1
11
xx
AIN1
1
0
00
ADC0
1
0
01
ADC1
1
0
10
ADC2
1
0
11
ADC3
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