.. _tt800:

tt800
=====

Description
'''''''''''

| 
|  A synthesizable Verilog program for TT800
|  Adapted from Twisted GFSR Generators II
|  Makoto Matsumoto and Yoshiharu Kurita
|  December 2, 1992
|  http://www.math.sci.hiroshima-u.ac.jp/~m-mat/eindex.html
| 

Pinout
''''''

.. _fig:tt800_block:
.. figure:: tt800_block.png
    :alt: Schematic symbol

Ports
'''''

.. list-table:: tt800_port_table
   :header-rows: 1

   * - Signal
     - Direction
     - Description
   * - clk
     - Input
     - timespec 3.0 ns
   * - en
     - Input
     - 
   * - init
     - Input
     - 
   * - initv[31:0]
     - Input
     - 
   * - y[31:0]
     - Output
     - 

Implementation and use
''''''''''''''''''''''

The `portable`_ `Verilog`_
implementation can be found in :ref:`tt800_source`

.. _`portable`: https://en.wikipedia.org/wiki/Software_portability
.. _`Verilog`: https://en.wikipedia.org/wiki/Verilog

Timing Diagram
''''''''''''''

A `GTKWave`_-generated timing diagram is shown below:

.. _`GTKWave`: https://gtkwave.sourceforge.net/

.. _fig:tt800_timing:
.. figure:: tt800_timing.png
    :alt: Timing diagram