.. _rb_port:

===================
Port register block
===================

The port register block has a header with type 0x0000C002, version 0x00000200, and indicates where the port control register blocks are located in the control register space.

.. table::

    ========  =============  ======  ======  ======  ======  =============
    Address   Field          31..24  23..16  15..8   7..0    Reset value
    ========  =============  ======  ======  ======  ======  =============
    RBB+0x00  Type           Vendor ID       Type            RO 0x0000C002
    --------  -------------  --------------  --------------  -------------
    RBB+0x04  Version        Major   Minor   Patch   Meta    RO 0x00000200
    --------  -------------  ------  ------  ------  ------  -------------
    RBB+0x08  Next pointer   Pointer to next register block  RO -
    --------  -------------  ------------------------------  -------------
    RBB+0x0C  Offset         Offset to port region           RO -
    ========  =============  ==============================  =============

See :ref:`rb_overview` for definitions of the standard register block header fields.

.. object:: Offset

    The offset field contains the offset to the start of the port region, relative to the start of the current region.

    .. table::

        ========  ======  ======  ======  ======  =============
        Address   31..24  23..16  15..8   7..0    Reset value
        ========  ======  ======  ======  ======  =============
        RBB+0x0C  Offset to port region           RO -
        ========  ==============================  =============