SAMA5D27 SOM1 QSPI Flash Programming

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rob1599
Posts: 6
Joined: Thu Oct 25, 2018 4:18 pm

SAMA5D27 SOM1 QSPI Flash Programming

Thu Mar 14, 2019 3:05 pm

I just got a new SAMA5D27 SOM1 Evaluation Kit. I have been using a SAMA5d3 Xplained.

Is there a procedure for programming the SAMA5D27 SOM1 QSPI flash? I have built and loaded the Yocto project on SD and it works great but I would like to flash my BOOT, kernel and rootfs. The https://www.at91.com/linux4sam/bin/view ... EKMainPage does not have any procedure for doing this the way the SAMA5D3 does. Is there a procedure defined somewhere that I can follow?
rob1599
Posts: 6
Joined: Thu Oct 25, 2018 4:18 pm

Re: SAMA5D27 SOM1 QSPI Flash Programming

Thu Mar 14, 2019 4:26 pm

I will answer my own question. It looks like the SAMA5D27 SOM1 can't boot from QSPI flash. Here is what I found when digging around:

SAMA5D2 devices can boot from SDCard or e.MMC memories connected to SDMMC0 or SDMMC1.
Though SDMMC0 supports up to x8 bus width and SDMMC1 up to x4 bus width, the ROM code transfers
data only with a x1 bus width through SDMMC_DAT0.
mdeneen
Posts: 2
Joined: Wed Mar 27, 2019 3:53 pm

Re: SAMA5D27 SOM1 QSPI Flash Programming

Wed Mar 27, 2019 4:51 pm

I don't think that this is true. See section 17.4.7.5 "QSPI NOR Flash Boot" in the SAMA5D27C datasheet.

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