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MSP430F5438操作FLASH,读写老是失败

Other Parts Discussed in Thread: MSP430F5438

NAND Flash: NANDNAND128W3A2BN6

单片机: MSP430F5438

使用XT1 32.768

擦除和读取都正常, 相关函数就不贴出来了

按页写总是不成功,写入的数据要么全是0, 总之写入的数据不对,  

寄存器返回 0xE0(换算为二进制为11100000) 或者 0x81(换算为二进制为10000001)

寄存器说明表,  根据这说明表和寄存器返回值, 总是 P/E/R C inactive, device ready , 即无效. 要么就是 操作错误.

找不到原因是什么, 谁对NAND操作熟悉的, 能帮忙解答一下吗