AnsweredAssumed Answered

imx6q lpddr2 slow read write

Question asked by Vieshoth N on Oct 13, 2016

We are working on the imx6q pop based som. We use 1GB lpddr2 (part number - MT42L128M64D2LL-25 AT:A) in our som. This lpddr2 has 2 channels and non interleaved. The CHANNEL0 has the address range from 0x80000000 to 0x9fffffff and CHANNEL1 has address range from 0x10000000 to 0x2fffffff. 


I can see a read and write time difference in between these two address regions. 


Reading and writing in the address space 0x80000000 - 0x9fffffff takes more time than reading and writing in the address range 0x10000000 - 0x2fffffff. 


What could be reason?  Can someone guide on me on this. I have attached my DCD here.

Please let me know if more details needed

NOTE: To test read and write in lpddr2 I use mtest command in u-boot.






Original Attachment has been moved to: