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firat_karatas
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Registered: ‎04-11-2013

Vivado 2015.4 MT41K256M16TW-107 DDR3L Controller

Hi All,

 

I am planning to use Zynq7045 SOC with DDR3L as MT41K256M16TW-107 AAT. Internal Hard controller of Zynq is only compatible with MT41K256M16 RE-125 which is 1600Mb/s. Can we modify some parameters in Zynq for using this IC? or Do we have to keep Hard Controller idle and use AXI MIG for the same?

 

This question is also asked in "https://forums.xilinx.com/t5/Zynq-All-Programmable-SoC/Zynq-DDR3-Controller-compatibility/td-p/709202" but the explanation of @vsrunga is not satisfied according to me. Because I do not figure out what he meant by the speed grade of MT41K256M16 RE-125 is 800Mhz. It is a DDR3-1600 RAM and it is not possible to use Zynq with 1600Mb/s speed, although the RAM supports according to the data sheet (DS191, Table 20: PS DDR Clock Domains Performance) the maximum achievable Speed Grade is 1066Mb/s. So in my opinion for Vivado 2015.4 & MT41K256M16TW-107 type, choosing MT41K256M16 RE-125 is fine since it is not possible to use it at 1600Mb/s and also MT41K256M16 RE-15E is fine too which is 1333Mb/s.

 

 

Am I missing something here?

 

Thanks in advance.

 

Regards

Firat

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