Override parts of BOOT_CFG1 by fuse?

[alampret]

Hi,

is it possible to override only some parts of BOOT_CFG1 by fuse?

My problem:

BOOT_CFG1 is defined by external resistors.

BOOT_MODE is set to 10 (Internal boot)

Now I need to changed SD card speed to SDR50 or SDR104 for some tests. Is it possible to override just these 2 bits? BOOT_CFG1[2,3]?

If yes, how?

Do I have to change BOOT_MODE to 00?

Thx,

Alexander

[Yuri]

Hello,

  such scenario, when part of BOOT_CFG bits are taken from fuses and other part - from GPIO

is not supported.

Have a great day,
Yuri

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[alampret]

Hi Yuri,

thx for your fast answer!

So in that case I have to set BOOT_CFG1 and BOOT_CFG2 in fuse, right?

What else is needed to make it work?

Thx,

Alexander

[Yuri]

Hi, Alexander !

  it is needed to burn the BOOT_CFGx, set BOOT_MODE[1:0] = 00 (Boot From Fuses)

and burn fuse BT_FUSE_SEL = 1.

Regards,

Yuri.