ATMEGA64A-MNR Atmel, ATMEGA64A-MNR Datasheet - Page 231

• Manufacturer Part Number: ATMEGA64A-MNR
• Description: IC MCU AVR 64K FLASH 8QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA64A-MNR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: SPI, UART, I2C
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 53
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Operating Temperature Range: - 40 C to + 85 C
• Processor To Be Evaluated: ATMEGA64A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

22.2
22.2.1
22.2.2
8160C–AVR–07/09
Register Description
SFIOR – Special Function IO Register
ACSR – Analog Comparator Control and Status Register
Table 22-1.
• Bit 3 – ACME: Analog Comparator Multiplexer Enable
When this bit is written logic one and the ADC is switched off (ADEN in ADCSRA is zero), the
ADC multiplexer selects the negative input to the Analog Comparator. When this bit is written
logic zero, AIN1 is applied to the negative input of the Analog Comparator. For a detailed
description of this bit, see
• 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 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 Compar-
ator.
Bit
0x20
(0x40)
Read/Write
Initial Value
Bit
0x08 (0x28)
Read/Write
Initial Value
ACME
See “Internal Voltage Reference” on page 55.
0
1
1
1
1
1
1
1
1
1
TSM
R/W
Analog Comparator Multiplexed Input
7
0
ACD
R/W
7
0
ADEN
x
1
0
0
0
0
0
0
0
0
ACBG
R/W
R
6
–
0
6
0
“Analog Comparator Multiplexed Input” on page
MUX2:0
000
001
010
011
100
101
110
111
xxx
xxx
ACO
N/A
R
5
R
5
–
0
R/W
ACI
Analog Comparator Negative Input
AIN1
AIN1
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
4
0
R
4
–
0
ACIE
R/W
ACME
3
0
R/W
3
0
ACIC
R/W
2
0
PUD
R/W
2
0
ACIS1
R/W
PSR2
1
0
R/W
1
0
ATmega64A
230.
ACIS0
R/W
PSR10
R/W
0
0
0
0
ACSR
SFIOR
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