SDRAM perfomance(single bank vs. dual bank)

Hi Steven,

Dual bank mode with interleaving is the recommended approach for best performance. This is what we have in DM816x TRM:

4.3.4.1 DMM Sections

4.3.4.1.1 Case 1: Two Memory Controllers, 2GB DDR Symmetrical Distribution

4.3.4.1.2 Case 2: Two Memory Controllers, 1152 MB (1 GB + 128 MB) DDR Symmetrical Distribution

4.3.4.1.3 Case 3: Two SDRAM Controllers, 1152 MB (1 GB + 128 MB) DDR Asymmetrical Distribution

NOTE: For optimal system performance, symmetric configuration is HIGHLY recommended. Unless dictated by system cost and other constraints, Asymmetrical distribution of memory should not be considered.

I can say that dual bank with (512MB + 512MB) SDRAM in interleave mode is recommended than single bank with 1GB SDRAM, for optimal performance.

Regards,

Pavel

Hi Pavel,

Thanks you very much!

Are there any performance test result in the DDR with single/dual bank mode?

Or how could I test it by myself?

Regards,

Steven

Hi Steven,

The performance test based on the latest EZSDK 5.05.02.00 is located at:

ti-ezsdk_dm816x-evm_5_05_02_00/board-support/docs/TI81XX_PSP_04.04.00.01_Feature_Performance_Guide.pdf

All performance numbers provided in this document are gathered using
• DM8168 EVM with DDR3 configured at 800 MHz clock (effective 1600MHz data rate)

Regards,

Pavel

Hi Pavel,

Thanks!

Does all performance test provided in this document using DDR dual bank mode?

Regards,

Steven