i.MX ProcessorsのトピックRe: IMX6ULL Boot configuration issue for Sd and eMMc

IMX6ULL Boot configuration issue for Sd and eMMc

ramesh6663 — Mon, 18 Sep 2017 10:01:45 GMT

Our Customised design using IMX6ULL we are facing the issue in SD boot and eMMc boot because we are not using switch for BT_CFG2[3] to change Sd or eMMc boot.

We followed the NXP EVK boot configuration resistor setting same in our design.

Following are the Queries:

Any difference in software ROM level between IMX6UL vs IMX6ULL processor?
How IMX6UL design working fine without change in BT_CFG2[3] logic level but IMX6ULL doesn't work?
Can be possible to change only Software code level(uboot) to make this board work SD/eMMC without hardware modification?

Please find the attached image which have marked the BT_CFG2[3]

Thanks in advance,

Rameshkumar

Re: IMX6ULL Boot configuration issue for Sd and eMMc

igorpadykov — Mon, 18 Sep 2017 23:10:14 GMT

Hi ramesh

ROM basically is the same for both IMX6UL and IMX6ULL processors.

One can try to find reason of such behaviour reading with jtag SRC_SBMR1,2 registers.

>Can be possible to change only Software code level(uboot) to make this board work SD/eMMC

>without hardware modification?

no, as boot configuration is sampled by ROM from boot pins.

Best regards
igor
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Re: IMX6ULL Boot configuration issue for Sd and eMMc

ramesh6663 — Wed, 20 Sep 2017 11:24:33 GMT

Thanks Igor