1 Reply Latest reply on Aug 19, 2020 12:06 AM by SwathiS_86

    CY8C4014FNI-421AT I2C Internal pull ups

    NaJa_4363881

      Hello,

       

      I have a question with internal pull-ups for PSoC 4 device (CY8C4014FNI-421AT). As per datasheets it can be seen that I can enable internal I2C 5.6 KOhms weak pulls ups through the below commands in firmware.

       

         SCB_scl_SetDriveMode(SCB_scl_DM_RES_UP);

         SCB_sda_SetDriveMode(SCB_sda_DM_RES_UP);

       

      Can you please advise whether using internal resistors on I2C data & clock lines provides similar performance as that of the external pull-ups and we can eliminate the use of external pull-ups to save space in the design?

       

      Best Regards,

      Nandhini Jayapandian