你好! 在BF518的规格书中,对于它的启动,有以下介绍: 1. BMODE[2:0] = 001:Boot from 8-bit or 16-bit external flash memory.(从地址0x2000 0000的地方开始启动) 2. BMODE[2:0] = 011:Boot from external serial SPI memory.(After an initial device detection routine, the kernel boots from either 8-bit, 16-bit, 24-bit or 32-bit addressable SPI flash or EEPROM ,memory that connects to SPI0_SEL2.)