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TDA2SX: TDA2S DDR3 interface Performance

Jiacai Wang
Intellectual 420 points
Part Number: TDA2SX

Hi,

As we known, TDA2S includes 2 DDR0 and DDR1 controllers, each DDR3 interface can connect with 2pcs 16bit DDR3 RAM, so TDA2S can connect 4pcs 16bit DDR3 RAM;

Based on above understanding, although TDA2S supports 2 DDR3 controller, DDR3 controller work under 32bit data bus, if we connect 4pcs 16bit 512M bytes DDR3 with 2 DDR3 controller,

is it equivalent to 2pcs 16bit 1G Bytes DDR3  with 1  DDR3 controller ?

Thanks 

  • 0
    TI__Mastermind 38300 points

    Hi,

    If you connect 2x 16-bit 1GB  (or 8Gb) DDR memories to 1x DDR controller, you would have the same amount of memory available as connecting 4x 16-bit 512MB (or 4Gb) DDR memories to 2x DDR controllers. 

    The system performance would vary when using 1x controller vs. 2x controllers, as using two controllers effectively provides a 64-bit data bus to the system. As an example, the two controllers can be interleaved such that system memory alternates between the two controllers every 128 bytes, utilizing both controllers in parallel. 

    Best regards,
    Kevin