6.5
6.6
6.7
6.8
外部时钟................................................ ................................................. 30
时钟输出缓冲器............................................... .......................................... 31
系统时钟分频器............................................... ................................... 31
注册说明................................................ ........................................ 32
7
电源管理及睡眠模式............................................. .... 34
7.1
7.2
7.3
7.4
睡眠模式....................................................................................................34
软件BOD禁用............................................... ...................................... 35
降低功耗............................................... ....................... 36
注册说明................................................ ........................................ 37
8
系统控制和复位.............................................. ...................... 40
8.1
8.2
8.3
8.4
8.5
复位AVR ............................................... ............................................ 40
复位源................................................ ................................................. 41
内部参考电压............................................... ............................... 43
看门狗定时器................................................ .............................................. 43
注册说明................................................ ........................................ 45
9
中断................................................. ............................................... 48
9.1
9.2
9.3
中断向量................................................ .............................................. 48
外部中断................................................ ........................................... 49
注册说明................................................ ........................................ 51
10个I / O端口............................................ .................................................. .... 56
10.1
10.2
10.3
10.4
介绍......................................................................................................56
港口作为通用数字I / O ........................................... .................................. 57
端口的第二功能............................................... ................................... 61
注册说明................................................ ........................................ 73
11 8位定时器/计数器........................................... ................................... 76
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
产品特点..........................................................................................................76
概观..........................................................................................................76
定时器/计数器时钟源............................................. ............................ 77
计数器单元....................................................................................................78
输出比较单元............................................... ........................................ 78
操作模式............................................... .......................................... 79
定时器/计数器时序图............................................. ........................ 80
8位定时器/计数器寄存器的说明.......................................... .............. 82
242
爱特梅尔ATtiny88汽车
9157C–AVR–03/12
