attiny167-esxz ATMEL Corporation, attiny167-esxz Datasheet - Page 204
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attiny167-esxz
Manufacturer Part Number
attiny167-esxz
Description
8-bit Avr 8-bit Microcontroller Microcontroller With 16k Bytes In-system Programmable Flash And Lin Controller
Manufacturer
ATMEL Corporation
Datasheet
1.ATTINY167-ESXZ.pdf
(277 pages)
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18.1.3
18.2
18.2.1
204
Analog Comparator Inputs
ATtiny167
DIDR0 – Digital Input Disable Register 0
Analog Compare Positive Input
• Bits 1, 0 – ACIS1, ACIS0: Analog Comparator Interrupt Mode Select
These bits determine which comparator events that trigger the Analog Comparator interrupt. The
different settings are shown in
Table 18-1.
Note:
• Bits 7,6 – AIN1D, AIN0D: AIN1D and AIN0D Digital Input Disable
When this bit is written logic one, the digital input buffer on the corresponding Analog Compare
pin is disabled. The corresponding PIN register bit will always read as zero when this bit is set.
When an analog signal is applied to the AIN0/1 pin and the digital input from this pin is not
needed, this bit should be written logic one to reduce power consumption in the digital input
buffer.
It is possible to select any of the inputs of the ADC Positive Input Multiplexer to replace the pos-
itive input to the Analog 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 ADCSRB register) is set and the ADC is switched off (ADEN in
ADCSRA register is zero), MUX[4..0] in ADMUX register select the input pin to replace the posi-
tive input to the Analog Comparator, as shown in
If ACME is cleared or ADEN is set, AIN1 pin is applied to the positive input to the Analog
Comparator.
Bit
Read/Write
Initial Value
ACIS1
0
0
1
1
When changing the ACIS1/ACIS0 bits, the Analog Comparator Interrupt must be disabled by
clearing its Interrupt Enable bit in the ACSR Register. Otherwise an interrupt can occur when the
bits are changed.
ACIS1 / ACIS0 Settings
ADC7D /
ACIS0
0
1
0
1
AIN1D
R/W
7
0
ADC6D /
AIN0D
R/W
6
0
Interrupt Mode
Comparator Interrupt on Output Toggle.
Reserved
Comparator Interrupt on Falling Output Edge.
Comparator Interrupt on Rising Output Edge.
Table
ADC5D
R/W
5
0
18-1.
ADC4D
R/W
4
0
Table
ADC3D
R/W
3
0
18-2.
ADC2D
R/W
2
0
ADC1D
R/W
1
0
ADC0D
R/W
0
0
7728A–AUTO–07/08
DIDR0
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