non-volatile memories in sama5d27Som1EKM

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ranran
Posts: 9
Joined: Wed Oct 03, 2018 11:39 am

non-volatile memories in sama5d27Som1EKM

Wed Oct 03, 2018 8:03 pm

Hello,

I got a bit confused after reviewing sama5d2 documentation about memories.
I hope someone can help with it.
In https://www.at91.com/linux4sam/bin/view ... EKMainPage it talks about u-boot loading from sd or from qspi:

"Tips: qspi means to read quad-SPI serial flash, sd means to read mmc card. "
in same page, there is a block diagram of the chip which mentions "LPDDR2/3 , SLC MLC DRAM , external BUS, bootrom, sram , fuse"

In another related page:
https://www.at91.com/linux4sam/bin/view ... edMainPage
It mentions "SPI + eMMC Flash demo - Memory map"

Is it that the emmc above refers to "SD card" ?

Thank you,
ranran
thackerp
Posts: 8
Joined: Tue Jul 19, 2016 10:19 pm

Re: non-volatile memories in sama5d27Som1EKM

Thu Oct 04, 2018 12:31 am

The pages you link to in your post are for two different boards.

The SAMA5D2 Xplained board has external (to the MPU) DDR3 SDRAM, an eMMC, a serial SPI flash, and a single SD card slot.
The SOM1-EK1 board has a SiP SAMA5D27, which has internal DDR2. The SOM itself has a 64Mbit QSPI flash. The SOM1-EK1 has no NVM, but has two SD card slots (one full size, one micro).

Both boards have a small EEPROM for MAC Address and SN storage. The user manuals for both boards can be found on the Microchip web site.

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