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DM3730 / wifi module SDIO throughput

Jake Pulliam
Expert 6520 points
Other Parts Discussed in Thread: WL1807MOD, DM3730

I would like to use I would like to use the WL1807MOD with a DM3730. The WL1807MOD supports 4-bit SDIO at 50MHz. With the overhead of the wifi software would the DM3730 be able to support a throughput of at least 110 Mbps?

Thanks,

Jake

  • 0
    TI__Guru 65405 points
    Hi Jake,

    According to the WL1807MOD specifications the maximum theoretical throughput is 80 Mbps for TCP and 100 Mbps for UDP streams but this is in ideal conditions when using packets with size of max MTU. I expect the real performance to be lower. Therefore throughput of 110 Mbps should not be expected.

    BR
    Tsvetolin Shulev
  • 0 in reply to Cvetolin Shulev-XID
    TI__Expert 6520 points

    Tsvetolin,

    Thanks for the input. I had been reading SW user's guide and I misinterpreted one of the sections, I should have just looked at the data sheet. Given that 100 Mbps is the theoretical limit would the DM3730 SDIO interface have any problem with that?

    Jake

  • 0 in reply to Jake Pulliam
    TI__Guru 65405 points

    Jake,

    The DM3730 SDIO has not a problem with the limit of 100 Mbps. The limitation comes from the WL1807MOD. According its description at the product page:

    where is written:

    20- and 40-MHz SISO and 20-MHz 2 × 2 MIMO

    at 2.4 GHz for High Throughput: 80 Mbps

    (TCP), 100 Mbps (UDP)


    In other hand the real ethernet performance which is observed via cable ethernet interface (which is rated at 100 Mbps) is around 42 Mbps. Therefore I could not guarantee described above throughput of WL1807MOD in real use.

    BR

    Tsvetolin Shulev