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Question, i.MX6Solo / data transfer speed of SD-Card Boot

Question asked by AVNET JAPAN FAE (team share account) on May 22, 2016
Latest reply on May 29, 2016 by Yuri Muhin

Dear team,


I would like to ask about the speed of SD-Card access in boot of i.MX6Solo.

My customer is trying to speed-up the transfer rate between SD-Card and i.MX6S at the boot.

The SD-Card is used for boot device now, and it can be used for boot in High Speed mode now. Because the SD-Card they are using supports UHS-I, they want to speed-up the transfer rate. And they changed the following settings of their board.

- Changing the voltage of SD-Card power from 3.3V to 1.8V.

- Changing BOOT_CFG[3:2] setting from 00 to 10

After the change the Boot cannot complete.

Could you show me what they missed on the settings?