#1. NAND的访问方式不是地址直接映射，不能通过地址直接在CCS里查看内容。
#2. 烧写到NAND中的地址与工程的cmd的地址分配置是两回事。版本2.1的芯片支持从block 0启动了。
参考勘误表sprz301m:
Silicon Revision 2.1 supports booting from Block 0 of the flash which many NAND
manufacturers guarantee as a “more reliable” block than all other blocks. Hence,
setting up boot to start from that Block 0 could help improve the reliability of boot.
This is a hardware change, requiring the bootmode pins BOOT[6:5] = 1x.