Hello,
I'd like to verify a resistor's board setting to BOOT from eMMC (please see attached).
1) In my design because of board spacing issue i have put only pull-down resistors on EIM_DA0-DA15 (BOOT_CFG1[0-5,7],BOOT_CFG2[0-2,5-7,11-12] ) ,i.e. only '0' may be configured externally and '1' i 'trust' in internal pull-up.. i.e. i.MX6 reads a values of inputs approximatelly 300uS-1mS after reset released, so pulled-up voltage is already stable.
2) In compare to SPF-27392 rev.C3.pdf (SabreSD schematic p.21 ) , I don't refer to EIM_A16-A24 (BT_CFG3_[0-7],BT_CFG4_0), EIM_WAIT/EIM_LBA/EIM_EB0,1/EIM_RW/EIM_EB2,3 (BT_CFG4_[1-7]).
Let's say that eMMC is already programmed.
I don't see any response on eMMC clock after power-up.
Actually in Manufacture Mode i can read write eMMC content.
Please advice.
Thanks.
Hi Victor
EIM_EB3 is floating, means BOOT_CFG4[7]=1 and
Infinite Loop Enable at of boot ROM. Used for debugging purposes.
This is described in Table 8-2. Boot eFUSE Descriptions
i.MX6DQ Reference Manual
http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6DQRM.pdf
Best regards
igor
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Hi Victor
>it MUST be '0'. Right?
yes.
Best regards
igor
But, on the other hand, when i tried blow fuses (eMMC boot source) with BOOT_CFG4[7]=0 (reset value) - it's still doesn't work...
May be you have an idea why?
BTW - eMMC was programmed not with ".. MFG Tools for programming eMMC, run mfgtool2-yocto-mx-sabresd-emmc.vbs script, its ucl2.xml contains commands which uses that script. "
Is it critical?
Thnk you.
>BTW - eMMC was programmed not with ".. MFG Tools for programming eMMC, run
>mfgtool2-yocto-mx-sabresd-emmc.vbs script, its ucl2.xml contains commands which uses that script. "
>Is it critical?
right this also may be reason