AT32UC3L
16.2
16.3
16.4
16.5
16.6
16.7
概观........................................................................................................280
框图................................................ ............................................... 280
产品相关................................................ .................................. 280
功能说明................................................ ................................... 281
用户界面................................................ ................................................ 286
模块配置................................................ .................................... 292
17外部中断控制器（ EIC ） ........................................... ........... 293
17.1
17.2
17.3
17.4
17.5
17.6
17.7
17.8
产品特点........................................................................................................293
概观........................................................................................................293
框图................................................ ............................................... 294
I / O线说明............................................. ........................................ 294
产品相关................................................ .................................. 294
功能说明................................................ ................................... 295
用户界面................................................ ................................................ 299
模块配置................................................ .................................... 315
18频率计（ FREQM ） ............................................ ...................... 316
18.1
18.2
18.3
18.4
18.5
18.6
18.7
产品特点........................................................................................................316
概观........................................................................................................316
框图................................................ ............................................... 316
产品相关................................................ .................................. 316
功能说明................................................ ................................... 317
用户界面................................................ ................................................ 319
模块配置................................................ .................................... 330
19通用输入/输出控制器（ GPIO ） ............................. 331
19.1
19.2
19.3
19.4
19.5
19.6
19.7
19.8
产品特点........................................................................................................331
概观........................................................................................................331
框图................................................ ............................................... 332
IO线说明............................................... ....................................... 332
产品相关................................................ .................................. 333
功能说明................................................ ................................... 334
用户界面................................................ ................................................ 340
模块配置................................................ .................................... 370
20通用同步异步收发器（ USART ） 371
20.1
20.2
产品特点........................................................................................................371
概观........................................................................................................371
iv
32099A–AVR32–06/09
