BOOT_MODE question

[niklasmolin]

I'm pretty new with Freescale and just trying to get a grasp of it.

I plan to start by using a dev. board (like SABRE lite).

We want to boot from the SATA interface and for the SABRE lite board I read that one should both change the boot switch (BOOT_MODE) and the U-boot (change to boot form the SATA).

What mode should the boot mode be in (Fuse or Internal)?

Thanks,

Niklas

[JerryFan · Accepted solution]

BOOT_MODE set to Internal BOOT, and refer RM　chapter "System boot" to set Boot_CFG pins.

[jian]

Hello all,

   I want to boot the device from the Fuese setting.But I don.t know how to setting the Fuese.I configure BOOT_MODE[1:0]=0b00,but it always on dowload mode.What can I do?Please help me!

   Thanks!

[PeterChan]

You need to blow the BOOT_CFGx fuse registers properly for your boot media and finally blow the BT_FUSE_SEL fuse to enable the boot from fuses. Otherwise the ROM always jumps to serial downloader.

[jian]

Yes，I wrote the fuse value and boot from it,But now I can only boot from it.And I wrote it by u-boot,but I want to write value to fuses by MfgTool.Can you help me?Thanks!

[PeterChan]

You can blow the fuses by Mfgtool. Please download our latest Mfgtool and read the last section of the document "Manufacturing Tool V2 UCL User Guide.docx" for the detail.