1 Reply Latest reply on Sep 11, 2014 11:16 AM by Intel_Alvarado

    I2C Pullups and 3 SPI Devices

    faceplant

      Does the Edison provide the I2C pullups, or are those required on expansion boards?

       

      Also, is it possible to attach more than two devices to the SPI bus, using a GPIO for the additional CS?

        • 1. Re: I2C Pullups and 3 SPI Devices
          Intel_Alvarado

          Hi faceplant,


          In the Edison module, when the pin mode is chosen as gpio, it can be programmed as an input or output. Inputs have programmable pullups or pulldowns. Pullup value can be 2, 20, or 50 kohm. I2C pins also have an additional 910 ohm value.

          Yes, it is possible to attach for more than two devices to the SPI bus. In order to do this, the SPI devices need to be set to the same speed so that the communication does not fail.


          Regards

          Sergio