:orphan:

.. _nordic_nrf_twim:

nordic,nrf-twim
###############

Vendor: :ref:`Nordic Semiconductor <dt_vendor_nordic>`

Description
***********

These nodes are "i2c" bus nodes.

.. code-block:: none

   Nordic nRF family TWIM (TWI master with EasyDMA).

   This binding can be used for nodes which can represent TWIM
   peripherals. A single SoC peripheral ID is often associated with
   multiple I2C peripherals, like a TWIM and a TWIS. You can choose
   TWIM by setting the node's "compatible" to "nordic,nrf-twim"
   and "status" to "okay", e.g. using an overlay file like this one:

       /* This is for TWIM0 -- change to "i2c1" for TWIM1, etc. */
       &i2c0 {
               compatible = "nordic,nrf-twim";
               status = "okay";
               /* other property settings can go here */
       };

   This works on any supported SoC, for all TWIM instances.

   Note: on nRF51 SoCs, use the "nordic,nrf-twi" binding instead.

Properties
**********

.. tabs::

   .. group-tab:: Node specific properties

      Properties not inherited from the base binding file.

      .. list-table::
         :widths: 1 1 4
         :header-rows: 1

         * - Name
           - Type
           - Details

         * - ``zephyr,concat-buf-size``
           - ``int``
           - .. code-block:: none

                If concatenation buffer size is set, then multiple messages in the same direction will be concatenated into single transfers as long as there is space in buffer and no restart or stop flag is set.
                This property must be provided when interacting with devices like the SSD1306 display that cannot tolerate a repeated start and address appearing on the bus between message fragments.  For many devices a concatenation buffer is not necessary.


         * - ``sda-pin``
           - ``int``
           - .. code-block:: none

                The SDA pin to use.

                For pins P0.0 through P0.31, use the pin number. For example,
                to use P0.16 for SDA, set:

                    sda-pin = <16>;

                For pins P1.0 through P1.31, add 32 to the pin number. For
                example, to use P1.2 for SDA, set:

                    sda-pin = <34>;  /* 32 + 2 */



             This property is **required**.

         * - ``scl-pin``
           - ``int``
           - .. code-block:: none

                The SCL pin to use. The pin numbering scheme is the same as
                the sda-pin property's.



             This property is **required**.

         * - ``clock-frequency``
           - ``int``
           - .. code-block:: none

                Initial clock frequency in Hz




   .. group-tab:: Deprecated node specific properties

      Deprecated properties not inherited from the base binding file.

      (None)

   .. group-tab:: Base properties

      Properties inherited from the base binding file, which defines
      common properties that may be set on many nodes. Not all of these
      may apply to the "nordic,nrf-twim" compatible.

      .. list-table::
         :widths: 1 1 4
         :header-rows: 1

         * - Name
           - Type
           - Details

         * - ``reg``
           - ``array``
           - .. code-block:: none

                register space


             This property is **required**.

             See :ref:`dt-important-props` for more information.

         * - ``interrupts``
           - ``array``
           - .. code-block:: none

                interrupts for device


             This property is **required**.

             See :ref:`dt-important-props` for more information.

         * - ``#address-cells``
           - ``int``
           - .. code-block:: none

                number of address cells in reg property


             This property is **required**.

             Constant value: ``1``

         * - ``#size-cells``
           - ``int``
           - .. code-block:: none

                number of size cells in reg property


             This property is **required**.

         * - ``label``
           - ``string``
           - .. code-block:: none

                Human readable string describing the device (used as device_get_binding() argument)


             This property is **required**.

             See :ref:`dt-important-props` for more information.

         * - ``status``
           - ``string``
           - .. code-block:: none

                indicates the operational status of a device


             Legal values: ``'ok'``, ``'okay'``, ``'disabled'``, ``'reserved'``, ``'fail'``, ``'fail-sss'``

             See :ref:`dt-important-props` for more information.

         * - ``compatible``
           - ``string-array``
           - .. code-block:: none

                compatible strings


             This property is **required**.

             See :ref:`dt-important-props` for more information.

         * - ``reg-names``
           - ``string-array``
           - .. code-block:: none

                name of each register space


         * - ``interrupts-extended``
           - ``compound``
           - .. code-block:: none

                extended interrupt specifier for device


         * - ``interrupt-names``
           - ``string-array``
           - .. code-block:: none

                name of each interrupt


         * - ``interrupt-parent``
           - ``phandle``
           - .. code-block:: none

                phandle to interrupt controller node


         * - ``clocks``
           - ``phandle-array``
           - .. code-block:: none

                Clock gate information


         * - ``clock-names``
           - ``string-array``
           - .. code-block:: none

                name of each clock


         * - ``dmas``
           - ``phandle-array``
           - .. code-block:: none

                DMA channels specifiers


         * - ``dma-names``
           - ``string-array``
           - .. code-block:: none

                Provided names of DMA channel specifiers


         * - ``io-channels``
           - ``phandle-array``
           - .. code-block:: none

                IO channels specifiers


         * - ``io-channel-names``
           - ``string-array``
           - .. code-block:: none

                Provided names of IO channel specifiers