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Update README.md
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WangHaiJun authored Jul 29, 2020
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* 一个FAT32分区(`10`), 用于存放`uImage`, `zImage`和设备树文件;
* 一个`rootfs`分区(`b`), 用于存放根文件系统;
* 一个`uboot`分区(`53`), 用于存放``BCB``u-boot.sb`镜像, 该分区为启动引导分区(`0x53`);
* 一个`uboot`分区(`53`), 用于存放`BCB``u-boot.sb`镜像, 该分区为启动引导分区(`0x53`);

那么我们可不可以自己手动给SD分区, 制作可启动的SD卡呢?当然是可以的, 在linux系统上, 只需要使用`fdisk`, `mkfs`, `dd`, `mxsboot(uboot自带的tools)`这几个工具就可以制作一个可启动的SD卡。

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## 参考文献

[u-boot/doc/imx/common/mxs.txt](https://github.com/u-boot/u-boot/blob/master/doc/imx/common/mxs.txt)
[u-boot/doc/imx/common/mxs.txt](https://github.com/u-boot/u-boot/blob/master/doc/imx/common/mxs.txt)

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