Is there anyway to connect 2 Gbyte of LPDDR2 to an i.MX53 ?

[pierreschirrer]

Hello community,

I designed a board with an i.MX53 and 1Gbyte of LPDDR2 using Micron memory, MT42L256M32D2 (16Meg x 32 x 8 banks x 2 die). Now I was asked to increase the memory to 2Gbytes. Unfortunately, Micron has not issued the MT42L512M32D4 (32 Meg x 16 x 8 banks x 4 die)...

Does anybody know how to connect several LPDDR2 chips to the SDRAM controller of the i.MX53 (there is only one SDRAM channel with only 2 chip selects on the i.MX53) ?

Any help would be appreciated,

Thanks.

[Yongxin]

Hi Pierre Schirrer,

Due to the configuration addressing of MT42L256M32D2, it is impossible to connect two MT42L256M32D2 in i.MX53.

The iMX53 is capable of addressing 2GB on CS0. Or if use both CS0 and 1, it can address 1GB on each one. It is recommended to use other LPDDR2 chip for the design.

Best Regards,

Yongxin

[pierreschirrer]

Thank you Yongxin Huang,

It is as I feared.