Linux/AM5728: DDR3 compatibility

satyanarayana P G64

Part Number: AM5728

Tool/software: Linux

Hi,

With reference to AM5728 EVM schematic, we have designed our custom board with AM5728 to suits our requirement. But, due to non availability or more lead time of Micron part (MT41K512M16HA) DDR3L is not available for us. hence we have selected pin to pin compatibility of Alliance memory (AS4C512M16D3L) DDR3L.

To make it work i.e AM5728 interface with Alliance memory (AS4C512M16D3L) DDR3L what are the necessary changes required in processor linux SDK, U-boot, DDR config, Emif files etc.

please guide us since these are BGA's once assembled we cannot re-solder it.

As per AM5728 EVM schematic processor is interfaced with Micron part DDR3L, we have to go for micron part for compatibility of drivers or any make is acceptable.

regards

satya

over 5 years ago

0 Biser Gatchev-XID over 5 years ago

TI__Guru**** 393215 points

For DDR3 requirements see section 8.2.2.5 in the AM572x Datasheet SR2.0. You must also follow this document: www.ti.com/.../sprac36b.pdf

0 satyanarayana P G64 over 5 years ago in reply to Biser Gatchev-XID

Expert 1330 points

HI,

Does it means, it is independent of MAKE . if DDR3 speed grade, bit width and count is compatible.

regards

satya

0 Biser Gatchev-XID over 5 years ago in reply to satyanarayana P G64

TI__Guru**** 393215 points

Yes, this is correct. They are JEDEC compatible parts.

0 satyanarayana P G64 over 5 years ago in reply to Biser Gatchev-XID

Expert 1330 points

Hi,

If it is JEDEC compatible then why in Uboot for ddr.c / sdram.c there is device details passing data for make, device speed grade, device bit width etc.

Does i have to pass these data for different make or just can i skip it.

regards

satya

0 Biser Gatchev-XID over 5 years ago in reply to satyanarayana P G64

TI__Guru**** 393215 points

You need only to follow the guide I pointed above. No other source code changes are necessary.

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Linux/AM5728: DDR3 compatibility