topic Re: iMX6 UL eMMC boot over usdhc2 in i.MX Processors

iMX6 UL eMMC boot over usdhc2

davidweidman — Wed, 07 Oct 2015 21:15:27 GMT

We were successfully able to boot over an eMMC device on usdhc2 on the EVK boards provided by Freescale which use the default ALT0 pins. However, on our software development kit that we designed we are using the ALT8 function of different pins for our eMMC device that we are trying to boot over as shown below. So how do we configure the iMX6 UL to boot over the non default usdhc2 pins below? I have already configured all the BOOT_CFG pins to be in their proper state.

D14	ALT8	usdhc2.CLK
A13	ALT8	usdhc2.CMD
C14	ALT8	usdhc2.DATA0
B14	ALT8	usdhc2.DATA1
A14	ALT8	usdhc2.DATA2
B16	ALT8	usdhc2.DATA3
A12	ALT8	usdhc2.DATA4
D13	ALT8	usdhc2.DATA5
C13	ALT8	usdhc2.DATA6
B13	ALT8	usdhc2.DATA7
B12	ALT8	usdhc2.RESET_B
J14	ALT8	usdhc2.CD_B

Thanks,

David

Re: iMX6 UL eMMC boot over usdhc2

igorpadykov — Thu, 08 Oct 2015 01:39:47 GMT

Hi David

boot iomux configuration is hardcoded and can not be changed,

it is described in Chapter 8 System Boot

Best regards

igor

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Re: iMX6 UL eMMC boot over usdhc2

davidweidman — Thu, 08 Oct 2015 01:41:26 GMT

Thank you very much.