eMMC does not go through the tuning procedure on the E3845 processor

[Andrey77]

Our design is based on the E3845 processor. We use eMMC memory from ISSI IS21ES08G as a hard disk. BIOS is written based on EDK II (tianocore). We managed to work with eMMC at SDR50 speed. This boots Linux from eMMC. However, we were unable to work with eMMC at HS200 speed. The problem lies in the tuning procedure. After sending the command CMD21 emmc issues a test sequence - this can be seen with the oscilloscope. However, after that, nothing happens on the bus and the BIOS will give us the error "EmmcTuningClkForHs200: Send tuning block fails with% r \ n", Status) ". Perhaps the initialization of the hardware has not been completed. How can we solve this problem?

[CarlosAM_INTEL]

Hello, @Andrey77:

Thank you for contacting Intel Embedded Community.

You should review the End of Technical Support for 4th Generation Intel® Core™ Processors and Intel Atom® Processors E38XX and Intel® Celeron® Processors J1XXX and N2XXX provided by the Internet of Things Group (IOTG) letter document # 632552 to have a clear idea of the support situation of the cited processor. You can find it when you are logged into your Resource & Design Center (RDC) privileged account on the following website:

https://cdrdv2.intel.com/v1/dl/getContent/632552

The RDC Account Support form is the channel to process your account update request or report any inconveniences with the provided website. It can be found at:

https://www.intel.com/content/www/us/en/forms/support/my-intel-sign-on-support.html

Best regards,

@CarlosAM_INTEL .