2.1.1. AHB-Lite Crossbar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....................................................................................................................................................................................................................... 17 2.1.3. APB 桥....................................................................................................................................................................................................................... ........................................................................................................................................................................................ ........................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ ........................................................................................................................................................................................ 17 2.1.4. 窄 IO 寄存器写入.................... ... ....................................................................................................................................................................................................................................... 18 2.2. 地址映射....................................................................................................................................................................................................... ....................................................................................................................................................................... ....................................................................................................................................................................... ....................................................................................................................................................................... ....................................................................................................................................................................................... ....................................................................................................................................................................................... ....................................................................................................................................................................................... ...24