参数资料
型号: ATMEGA1284-AUR
厂商: Atmel
文件页数: 103/160页
文件大小: 0K
描述: IC MCU AVR 128K FLASH 44TQFP
产品培训模块: megaAVR Introduction
标准包装: 1
系列: AVR® ATmega
核心处理器: AVR
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 32
程序存储器容量: 128KB(64K x 16)
程序存储器类型: 闪存
EEPROM 大小: 4K x 8
RAM 容量: 16K x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 5.5 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-TQFP
包装: 剪切带 (CT)
47
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
10.12 Register description
10.12.1
SMCR – Sleep Mode Control Register
The Sleep Mode Control Register contains control bits for power management.
Bits 3, 2, 1 – SM2:0: Sleep Mode Select Bits 2, 1, and 0
These bits select between the five available sleep modes as shown in Table 10-2.
Note:
1. Standby modes are only recommended for use with external crystals or resonators.
Bit 0 – SE: Sleep Enable
The SE bit must be written to logic one to make the MCU enter the sleep mode when the SLEEP
instruction is executed. To avoid the MCU entering the sleep mode unless it is the programmer’s
purpose, it is recommended to write the Sleep Enable (SE) bit to one just before the execution of
the SLEEP instruction and to clear it immediately after waking up.
Bit
7
6
543210
SM2
SM1
SM0
SE
SMCR
Read/Write
RRRR
R/W
Initial Value
0
000000
Table 10-2.
Sleep mode select.
SM2
SM1
SM0
Sleep mode
000
Idle
0
1
ADC Noise Reduction
010
Power-down
011
Power-save
100
Reserved
101
Reserved
110
Standby(1)
1
Extended Standby(1)
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