7.1空闲模式...............................................................................................................52
7.2 ADC噪声抑制模式............................................. ..................................... 52
7.3掉电模式............................................. .................................................. ..52
7.4省电模式............................................. .................................................. ... 52
7.5待机模式.......................................................................................................53
7.6扩展Standby模式.............................................. ......................................... 53
7.7功率降低注册.............................................. ....................................... 54
7.8最小化功耗.............................................. .............................. 55
8
系统控制和复位.............................................. ...................... 57
8.1内部参考电压.............................................. ...................................... 62
8.2看门狗定时器....................................................................................................63
9
中断................................................. ............................................... 68
9.1中断向量ATmega32U6 / AT90USB64 / 128 ......................................... .... 68
10个I / O端口............................................ .................................................. .... 72
10.1简介..........................................................................................................72
10.2端口作为通用数字I / O .......................................... ....................................... 73
10.3端口的第二功能.............................................. ........................................ 77
10.4寄存器说明的I / O端口......................................... ............................... 90
11外部中断............................................... .................................. 94
12定时器/计数器，定时器/计数器和定时器/计数器预分频器... 98
12.1内部时钟源.............................................. ............................................ 98
12.2预分频器复位...................................................................................................98
12.3外部时钟源.............................................. ........................................... 98
12.4通用定时器/计数器控制寄存器 - GTCCR ......................................... ... 99
13 8位定时器/计数器与PWM ......................................... ................. 100
13.1概述............................................................................................................100
13.2定时器/计数器时钟源............................................ ............................... 101
13.3计数器单元......................................................................................................101
13.4输出比较单元.............................................. ........................................... 102
13.5比较匹配输出单元............................................. ................................. 104
13.6工作模式.............................................. ............................................. 105
13.7定时器/计数器时序图............................................ ........................... 109
13.8 8位定时器/计数器寄存器的说明......................................... ................. 110
14个16位定时器/计数器（定时器/计数器和定时器/计数器） ........... 117
452
ATmega32U6/AT90USB64/128
7593H–AVR–11/08
