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      參數(shù)資料
      型號(hào): ATMEGA1284-AUR
      廠商: Atmel
      文件頁數(shù): 98/160頁
      文件大?。?/td> 0K
      描述: IC MCU AVR 128K FLASH 44TQFP
      產(chǎn)品培訓(xùn)模塊: megaAVR Introduction
      標(biāo)準(zhǔn)包裝: 1
      系列: AVR® ATmega
      核心處理器: AVR
      芯體尺寸: 8-位
      速度: 20MHz
      連通性: I²C,SPI,UART/USART
      外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
      輸入/輸出數(shù): 32
      程序存儲(chǔ)器容量: 128KB(64K x 16)
      程序存儲(chǔ)器類型: 閃存
      EEPROM 大小: 4K x 8
      RAM 容量: 16K x 8
      電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
      數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
      振蕩器型: 內(nèi)部
      工作溫度: -40°C ~ 85°C
      封裝/外殼: 44-TQFP
      包裝: 剪切帶 (CT)
      42
      8272E–AVR–04/2013
      ATmega164A/PA/324A/PA/644A/PA/1284/P
      10. Power management and sleep modes
      10.1
      Overview
      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
      consumption to the application’s requirements.
      When enabled, the Brown-out Detector (BOD) actively monitors the power supply voltage during
      the sleep periods. To further save power, it is possible to disable the BOD in some sleep modes.
      10.2
      Sleep Modes
      Fi gu re 9- 1 on pa ge 3 0 pr ese n ts th e d i ffer e n t clo ck sys tem s in th e At me l
      ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P, and their distribution. The figure is
      helpful in selecting an appropriate sleep mode. Table 10-1 shows the different sleep modes,
      their wake up sources and BOD disable ability.
      Notes:
      1. Only recommended with external crystal or resonator selected as clock source.
      2. If Timer/Counter2 is running in asynchronous mode.
      To enter any of the 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 will be activated by the SLEEP instruction. See Table 10-2 on page 47 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.
      Table 10-1.
      Active Clock Domains and Wake-up Sources in the Different Sleep Modes.
      Active Clock Domains
      Oscillators
      Wake-up Sources
      So
      ftw
      are
      B
      O
      D
      Disdab
      le
      Sleep Mode
      clk
      CPU
      clk
      FLASH
      clk
      IO
      clk
      ADC
      clk
      ASY
      Main
      Clo
      c
      k
      So
      ur
      ce
      Enab
      led
      T
      imer
      Osc
      Enab
      led
      IN
      T2:
      0
      and
      Pin
      Chang
      e
      T
      W
      IAd
      dress
      Matc
      h
      Ti
      m
      e
      r2
      SPM/
      EEPR
      O
      M
      R
      ead
      y
      AD
      C
      WD
      T
      I
      n
      te
      rr
      up
      t
      Oth
      e
      rI/O
      Idle
      X
      XXXXXXX
      ADCNRM
      X
      XX
      XXX
      Power-down
      X
      Power-save
      X
      XXX
      X
      Standby(1)
      XX
      X
      Extended
      Standby
      XX(2)
      XXX
      X
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