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以前使用的是DM6446AZWT，最近生产了一批DM6446BZWT，所有的B版本的6446，NAND FLASH都不启动。
问：BZWT与ZAWT有什么区别？
你好，
ROM code有变化，请参考移植文档http://www.ti.com/lit/an/sprab80/sprab80.pdf。
下面的信息也可以参考：
http://processors.wiki.ti.com/index.php/Determining_compatibility_between_ROM_Bootloader_(RBL)_and_Raw_NAND_devices#NAND_parameter_read_features.2Fmethods_supported_in_various_TI_devices_RBLs
