Forum Discussion

kiransr's avatar
kiransr
Icon for Occasional Contributor rankOccasional Contributor
2 years ago

Stratix 10 I2C IP Maximum speed of Operation

Hi, I would be using an I2C IP on the Stratix10 FPGA. What is the maximum speed of operation of this I2C IP. Is it interns of Giga or Megha Hertz would like to know the exact frequency range the I...
Generic Io
kiransr's avatar
kiransr
Icon for Occasional Contributor rankOccasional Contributor
2 years ago

Hi,

Please understand my query,

I am not asking for I2C soft IP speed and its limitations. My query is not around I2C, my question is all about

open-drain IOs that come with stratix-10 device.

Please let me know - what is the max speed the open-drain IO can operate ?

Thanks,

Kiran

kiransr's avatar
kiransr
Icon for Occasional Contributor rankOccasional Contributor
2 years ago

so, do you mean - that Stratix-10 open-drain IO is limited to operate upto max 400KHz, time-constant of open-drain IO does not support to run beyond 400Khz ? Please request for a binary answer.

  • FvM's avatar
    FvM
    Icon for Super Contributor rankSuper Contributor
    2 years ago

    You did not refer to IO speed in initial posts, really confusing. Speed of open drain is surely not limited to 400 kHz, it can be affected by varying the pull-up resistors. 400 kHz for fast mode has been specified in I2C standard to support common applications. Details are discussed here https://www.nxp.com/docs/en/user-guide/UM10204.pdf

    I suggest to check the achievable speed for your actual hardware, at least HPS I2C interface should allow to adjust speed.

    • kiransr's avatar
      kiransr
      Icon for Occasional Contributor rankOccasional Contributor
      2 years ago

      Please understand the Question carefully

      I am not using the I2C IP from Startix device, I have designed a soft I2C master module, would like to run this I2C master IP at 1Mhz or above, but can i use this IP and connect it to stratix open-drain IO,

      will the IO support 1Mhz speed or not ?