ATMEGA644V-10MUR Atmel, ATMEGA644V-10MUR Datasheet - Page 39

• Manufacturer Part Number: ATMEGA644V-10MUR
• Description: MCU AVR 64K FLASH 10MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644V-10MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• 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): 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

8. Power Management and Sleep Modes
8.1
8.2
Table 8-1.
Notes:
2593N–AVR–07/10
Sleep Mode
Idle
ADCNRM
Power-down
Power-save
Standby
Extended
Standby
Overview
Sleep Modes
1. Only recommended with external crystal or resonator selected as clock source.
2. If Timer/Counter2 is running in asynchronous mode.
3. For INT2:0, only level interrupt.
(1)
Active Clock Domains and Wake-up Sources in the Different Sleep Modes.
Active Clock Domains
Sleep modes enable the application to shut down unused modules in the MCU, thereby saving
power. The AVR provides various sleep modes allowing the user to tailor the power consump-
tion to the application’s requirements.
Figure 7-1 on page 27
bution. The figure is helpful in selecting an appropriate sleep mode.
different sleep modes and their wake-up sources.
To enter any of the five sleep modes, the SE bit in SMCR must be written to logic one and a
SLEEP instruction must be executed. The SM2, SM1, and SM0 bits in the SMCR Register select
which sleep mode (Idle, ADC Noise Reduction, Power-down, Power-save, or Standby) will be
activated by the SLEEP instruction. See
If an enabled interrupt occurs while the MCU is in a sleep mode, the MCU wakes up. The MCU
is then halted for four cycles in addition to the start-up time, executes the interrupt routine, and
resumes execution from the instruction following SLEEP. The contents of the Register File and
SRAM are unaltered when the device wakes up from sleep. If a reset occurs during sleep mode,
the MCU wakes up and executes from the Reset Vector.
X
X
X
X
X
X
X
(2)
presents the different clock systems in the ATmega644, and their distri-
Oscillators
X
X
X
X
X
X
X
X
(2)
(2)
(2)
(2)
Table 8-2
X
X
X
X
X
X
(3)
(3)
(3)
(3)
(3)
for a summary.
X
X
X
X
X
X
X
Wake-up Sources
X
X
X
(2)
X
X
ATmega644
Table 8-2
X
X
X
X
X
X
X
X
shows the
X
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