參數(shù)資料
型號： ATMEGA329V-8MUR
廠商： Atmel
文件頁數(shù)： 105/146頁
文件大?。?/td> 0K
描述： MCU AVR 32K FLASH 8MHZ 64QFN
產品培訓模塊： megaAVR Introduction
標準包裝： 4,000
系列： AVR® ATmega
核心處理器： AVR
芯體尺寸： 8-位
速度： 8MHz
連通性： SPI，UART/USART，USI
外圍設備： 欠壓檢測/復位，LCD，POR，PWM，WDT
輸入/輸出數(shù)： 54
程序存儲器容量： 32KB（16K x 16）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 1K x 8
RAM 容量： 2K x 8
電壓 - 電源 (Vcc/Vdd)： 1.8 V ~ 5.5 V
數(shù)據轉換器： A/D 8x10b
振蕩器型： 內部
工作溫度： -40°C ~ 85°C
封裝/外殼： 64-VFQFN 裸露焊盤
包裝： 帶卷 (TR)
其它名稱： ATMEGA329V-8MUR-ND
ATMEGA329V-8MURTR
35
2552K–AVR–04/11
ATmega329/3290/649/6490
9.
Power Management and Sleep Modes
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.
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, see “SMCR – Sleep Mode Control Register” on page 39.
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 Table 9-1 on page 35 for a summary. 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.
Figure 8-1 on page 26 presents the different clock systems in the ATmega329/3290/649/6490,
and their distribution. The figure is helpful in selecting an appropriate sleep mode.
Notes:
1. Only recommended with external crystal or resonator selected as clock source.
2. If either LCD controller or Timer/Counter2 is running in asynchronous mode.
3. For INT0, only level interrupt
Table 9-1.
Active Clock Domains and Wake-up Sources in the Different Sleep Modes.
Active Clock Domains
Oscillators
Wake-up Sources
Sleep
Mode
cl
k
CP
U
cl
k
FLA
SH
cl
k
IO
cl
k
AD
C
cl
k
AS
Y
Main
Cloc
k
Sour
ce
Enab
led
Timer
Os
c
Enab
led
INT0
an
d
P
in
Chang
e
USI
Sta
rt
Cond
iti
o
n
LCD
Cont
ro
ller
Timer2
SPM/EE
P
R
O
M
Re
ad
y
AD
C
Oth
e
rI/O
Idle
X
XX
X
ADC
Noise
Reduction
X
XX(2)
XX
Power-
down
X
Power-
save
X
XX
X
Standby(1)
XX(3)
X
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