请教几个问题：
1、在sprabb1c第6章
Master Boot – Booting From a Slave Memory Device
To boot from a slave memory device connected to SPI or I2C peripherals, AIS (in binary format) can be
directly Flashed to the memory device.
For booting from a NOR Flash, a configuration word is required before AIS as shown in Figure 3. NOR
Flash should be connected to EMA_CS[2] of the EMIFA peripheral
-----是不是说如果要从spi flash启动 必须要连接到EMA_CS[2]，如果需要的话是哪个pin要连？
2、spi flash 的地址应该映射到哪个范围
本人菜鸟，请高手指教，多谢！
