AT90USB82/162

目录

产品特点..................................................................................................... 1

1

2

引脚配置................................................ ................................... 3

概述................................................. .................................................. 4

2.1框图.........................................................................................................4

2.2引脚说明......................................................................................................5

3

4

代码例子............................................... .............................. 7

AVR CPU内核

.......................................................................................... 8

4.1简介..............................................................................................................8

4.2结构概述............................................... ............................................. 8

4.3 ALU - 算术逻辑单元............................................ ........................................ 9

4.4状态寄存器........................................................................................................9

4.5通用寄存器文件............................................. ................................. 11

4.6堆栈指针.........................................................................................................12

4.7指令执行时间.............................................. ................................... 12

4.8复位和中断处理............................................. ................................... 13

5

AVR AT90USB82 / 162记忆............................................. .............. 16

5.1在系统内可编程闪存程序存储器.......................................... 0.16

5.2 SRAM数据存储器.............................................. ............................................... 17

5.3 EEPROM数据存储器.............................................. .......................................... 18

5.4 I / O存储器............................................................................................................24

6

系统时钟及时钟选项............................................. ............ 25

6.1时钟系统及其分布............................................ ......................... 25

6.2时钟切换..........................................................................................................26

6.3时钟源.......................................................................................................29

6.4低功耗晶振............................................. .................................... 30

6.5标定的片内RC振荡器............................................. .............................. 32

6.6外部时钟.......................................................................................................34

6.7时钟输出缓冲器.............................................. ................................................. 34

6.8系统时钟预分频器.............................................. .......................................... 34

6.9 PLL ........................................................................................................................36

7

8

配电................................................ ................................. 39

电源管理及睡眠模式............................................. .... 41

i

7707F–AVR–11/10