topic Re: iMX53 choose boot from which mmc interface? in i.MX Processors

iMX53 choose boot from which mmc interface?

JayZhang — Sun, 22 Apr 2012 03:33:10 GMT

Is there a GPIO pin that can choose which mmc interface to boot up ?

Sorry for my poor English and thanks for your suggest!

Re: iMX53 choose boot from which mmc interface?

JayZhang — Sun, 22 Apr 2012 03:33:25 GMT

Any one can help me?

Re: iMX53 choose boot from which mmc interface?

Yuri — Mon, 23 Apr 2012 03:08:25 GMT

According to Table 7-15 (ESDHC Boot eFUSE Descriptions) of i.MX53 Reference
Manual (RM), BOOT_CFG3[5:4] fuses are responsible for SD port selection.

Table 7-3 (GPIO Override Contact Assignments) of the RM shows what pins
may be used instead of fuses.

http://cache.freescale.com/files/32bit/doc/ref_manual/iMX53RM.pdf

Re: iMX53 choose boot from which mmc interface?

KrishnaPavan — Tue, 24 Apr 2012 14:01:30 GMT

Hi Yuri Mihin,

What about the DIP Switches, that are used in general then?

What should be the state of them, If we use GPIO Pins directly?

Re: iMX53 choose boot from which mmc interface?

Yuri — Wed, 25 Apr 2012 03:02:28 GMT

SD port select option BOOT_CFG3[5:4] (EIM_DA6, EIM_DA7) may be configured on (BOOT) SW1
of the QSB. Please use the scheme for details.
Also one may look at section 5.5.2 (Boot Mode Operations and Selections)
of “Hardware Reference Manual for i.MX53 Quick Start”.

Re: iMX53 choose boot from which mmc interface?

xizhouwang — Thu, 26 Apr 2012 07:43:25 GMT

FYI

Comment by Mark Middletonon November 28, 2011 at 10:40am

To boot from SD3 (Full size SD Card socket), the "short" answer is to solder a wire between pads 2 & 19 of SW1. See picture. For more detail, see section 5.4.2 of the HW User Guide. The SW1 footprint was designed for a Multicomp MCNHDS-10-T Dip switch.

Re: iMX53 choose boot from which mmc interface?

JayZhang — Sat, 28 Apr 2012 00:36:28 GMT

Hy,

Thanks a lot.

xizhou wang said:

FYI

Comment by Mark Middletonon November 28, 2011 at 10:40am
To boot from SD3 (Full size SD Card socket), the "short" answer is to solder a wire between pads 2 & 19 of SW1. See picture. For more detail, see section 5.4.2 of the HW User Guide. The SW1 footprint was designed for a Multicomp MCNHDS-10-T Dip switch.