Differences between iMX7 Sabre Rev B and Rev D

[brianpaiva]

I have an MCIMX7D-SABRE RevB (SCH-28590 Rev B), but the only schematic that I can find is for Rev D(SCH-28590 Rev D).  Are there any major differences between the two and is there a Rev B schematic available?  I'm trying to get support for SDR104 SD Cards, but can't get it to work in 1.8V mode.

[jan_spurek]

Hello Brian,

all changes should be listed on the first page of the board schematic.

Best Regards,

Jan

[brianpaiva]

Based on what I read, am I right in assuming that for SD1 the only way to support SDR104 is to set it in the fuses?

[Yuri]

Hello,

  NVCC_SD1 supply voltage is provided by the PMIC on the i.MX7 SABRE

design. This voltage is configured using SD_VSEL signal of the PMIC:

SD_VSEL is input from i.MX processor (GPIO1_IO08 on the SABRE) to select

VCC_SD regulator voltage. So, SD1 supply voltage is programmable.

   IMX7 GPIO1_IO08 default state is GPIO port, input, pulled down, therefore

just after reset NVCC_SD1 is 3 V. Customers cannot change it for SD1 boot,

but can modify the voltage after boot in OS.

Have a great day,
Yuri

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