ATTINY44A-SSUR Atmel, ATTINY44A-SSUR Datasheet - Page 129
ATTINY44A-SSUR
Manufacturer Part Number
ATTINY44A-SSUR
Description
MCU AVR 4KB FLASH 20MHZ 14SOIC
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY24A-MU.pdf
(286 pages)
Specifications of ATTINY44A-SSUR
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
USI
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
12
Program Memory Size
4KB (2K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ATTINY44A-SSU SL383
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATTINY44A-SSUR
Manufacturer:
ATMEL
Quantity:
21 500
Part Number:
ATTINY44A-SSUR
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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15.2
15.2.1
8183C–AVR–03/11
Register Description
ACSR – Analog Comparator Control and Status Register
15-1. If ACME is cleared or ADEN is set, AIN1 is applied to the negative input to the analog
comparator.
Table 15-1.
• 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 5 – ACO: Analog Comparator Output
The output of the Analog Comparator is synchronized and then directly connected to ACO. The
synchronization introduces a delay of 1 - 2 clock cycles.
• Bit 4 – ACI: Analog Comparator Interrupt Flag
This bit is set by hardware when a comparator output event triggers the interrupt mode defined
by ACIS1 and ACIS0. The Analog Comparator interrupt routine is executed if the ACIE bit is set
Bit
0x08 (0x28)
Read/Write
Initial Value
ACME
0
1
1
1
1
1
1
1
1
1
Analog Comparator Multiplexed Input
ACD
R/W
ADEN
0
7
X
1
0
0
0
0
0
0
0
0
ACBG
R/W
0
6
MUX[4:0]
XXXXX
XXXXX
00000
00001
00010
00011
00100
00101
00110
00111
ACO
N/A
R
5
Analog Comparator Negative Input
AIN1
AIN1
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
R/W
ACI
4
0
ACIE
R/W
3
0
ATtiny24A/44A/84A
ACIC
R/W
2
0
ACIS1
R/W
1
0
ACIS0
R/W
0
0
ACSR
129
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