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Registered: ‎04-09-2019

VIVADO 2019.2 PS DDR data bus width

I have a project that use 16 bits LPDDR2. When i set the PS memory configuration with VIVADO 2019.2, the DDR_DQ port is 32 bits even though i selected the effective dram data width to 16 bits.

I dont have this issue with VIVADO 2017.4 where DDR_DQ is 16 bit as well.

 

I noticed that the PS DDR configuration data width options have changed in the VIVADO 2019.2. Both 16 & 32 bits are available (only 16 bits was available with VIVADO 2017.4).

 

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Registered: ‎03-25-2019

Hi @plabrecq_teledyne,

> I have a project that use 16 bits LPDDR2. When i set the PS memory configuration with VIVADO 2019.2, the DDR_DQ port is 32 bits even though i selected the effective dram data width to 16 bits.

I have reported the issue to our development team.

> I noticed that the PS DDR configuration data width options have changed in the VIVADO 2019.2. Both 16 & 32 bits are available (only 16 bits was available with VIVADO 2017.4).
This because the LPDDR2 32bit is supported too.
Check "10.1.5 DDR Memory Types, Densities, and Data Widths" section on UG585:

abouassi_0-1602762891173.png

 



Best regards,
Abdallah
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