7.10运行时的时钟源选择........................................... ................................. 28
7.11寄存器说明............................................... .............................................. 29
8
电源管理及睡眠模式............................................. .... 31
8.1空闲模式................................................................................................................32
8.2 ADC噪声抑制模式............................................. ..................................... 32
8.3省电模式............................................. .................................................. ... 32
8.4掉电模式............................................. .................................................. ..33
8.5断电模式......................................................................................................33
8.6功率降低注册.............................................. ........................................ 36
8.7最小化功耗.............................................. ............................... 37
9
系统控制和复位.............................................. ...................... 39
9.1复位AVR .............................................. .................................................. ..39
9.2复位源........................................................................................................39
9.3看门狗定时器.....................................................................................................43
9.4寄存器说明............................................... ................................................ 46
10唤醒定时器............................................. .......................................... 49
10.1概述..............................................................................................................49
10.2寄存器说明............................................... .............................................. 49
11中断................................................ ................................................ 51
11.1中断向量ATmega406 ............................................. ............................. 51
11.2之间移动应用程序和Boot航天中断..................................... 54
11.3寄存器说明............................................... .............................................. 55
12外部中断............................................... .................................. 56
12.1概述..............................................................................................................56
12.2寄存器说明............................................... .............................................. 56
13低电压I / O端口.......................................... .................................. 60
13.1简介...........................................................................................................60
13.2低电压端口作为通用数字I / O ........................................ ..................... 61
13.3端口的第二功能.............................................. ......................................... 66
13.4寄存器说明............................................... .............................................. 73
14高电压的I / O端口........................................... ................................ 75
14.1高压端口作为通用数字输出.......................................... .......... 75
14.2配置引脚.............................................. ................................................. 76
14.3寄存器说明高压输出端口.......................................... ... 76
ii
ATmega406
2548E–AVR–07/06
