i.MX Processors中的主题 Re: Differences between iMX7 Sabre Rev B and Rev D

Differences between iMX7 Sabre Rev B and Rev D

brianpaiva — Tue, 24 Oct 2017 14:34:53 GMT

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.

Re: Differences between iMX7 Sabre Rev B and Rev D

jan_spurek — Wed, 25 Oct 2017 07:38:43 GMT

Hello Brian,

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

Best Regards,

Jan

Re: Differences between iMX7 Sabre Rev B and Rev D

brianpaiva — Wed, 25 Oct 2017 14:45:23 GMT

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?

Re: Differences between iMX7 Sabre Rev B and Rev D

Yuri — Thu, 26 Oct 2017 02:53:56 GMT

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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