ATTINY40-MMHR Atmel, ATTINY40-MMHR Datasheet - Page 102
ATTINY40-MMHR
Manufacturer Part Number
ATTINY40-MMHR
Description
MCU AVR 4KB FLASH 12MHZ 3X3 QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY40-MMHR.pdf
(216 pages)
Specifications of ATTINY40-MMHR
Core Processor
AVR
Core Size
8-Bit
Speed
12MHz
Connectivity
I²C, SPI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
18
Program Memory Size
4KB (2K x 16)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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14.1
14.2
14.2.1
102
Analog Comparator Multiplexed Input
Register Description
ATtiny40
ACSRA – Analog Comparator Control and Status Register
When the Analog to Digital Converter (ADC) is configurated as single ended input channel, it is
possible to select any of the ADC[7:0] pins to replace the negative input to the Analog Compara-
tor. The ADC multiplexer is used to select this input. If the Analog Comparator Multiplexer
Enable bit (ACME in ADCSRB) is set, MUX bits in ADMUX select the input pin to replace the
negative input to the analog comparator.
Table 14-1.
• 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.
• Bit 6 – ACBG: Analog Comparator Bandgap Select
When this bit is set, a fixed, internal bandgap reference voltage replaces the positive input to the
Analog Comparator. When this bit is cleared, AIN0 is applied to the positive input of the Analog
Comparator.
Bit
0x14
Read/Write
Initial Value
ACME
0
1
1
1
1
1
1
1
1
1
1
1
1
Analog Comparator Multiplexed Input
ACD
R/W
MUX[3:0]
7
0
XXXX
0000
0001
0010
0100
0101
1000
1001
1010
0011
0110
0111
1011
ACBG
R/W
6
0
Analog Comparator Negative Input
AIN1
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
ADC8
ADC9
ADC10
ADC11
ACO
N/A
R
5
R/W
ACI
4
0
ACIE
R/W
3
0
ACIC
R/W
2
0
ACIS1
R/W
1
0
ACIS0
R/W
0
0
8263A–AVR–08/10
ACSRA
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