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T2080RDB SPI Flash

Question asked by Hawk Kim on Apr 28, 2015
Latest reply on May 7, 2015 by Hawk Kim

Hello,

 

While evaluating T2080RDB, I came across an issue related with SPI flash.

 

The thing is , upon power up, it works quite well. I can probe, create JFFS2 file system, mount it, and use it.
But when I reboot (not power off/power on), the system fails to read JEDEC ID of the SPI flash.

And if this happens, no matter what I do, the SPI flash doesn't work. But if I power off/on again, the flash starts working again.

 

Adding one more thing, while investigating this issue suspecting chip reset upon reboot, I found out that there is no RESET pin on the n25q512ax3 flash chip.

 

I'm using V1.7 SDK with DTB patch on n25q512ax3 flash chip.

 

Any idea will be appreciated.

 

Thanks,

H.Kim

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