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?