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-.. _usart:
-
-USART
-=====
-
-A USART is more commonly known a *serial port*.  It's used to transmit
-information between Maple and another device (like your computer,
-another Maple, etc.).
-
-.. contents:: Contents
-   :local:
-
-Hardware/Circuit Design
------------------------
-
-.. TODO [0.0.12] Add some more information here (like how you should
-.. connect TX_a to RX_b and RX_a to TX_b).
-
-.. TODO [0.0.12/Maple Native] UART4 and UART5, Native links
-
-Each LeafLabs board has at least 3 separate USART devices. In the most
-simple use case, the RX and TX pins are used to send data at a
-predetermined speed (or *baud rate*).  Their usage is documented in
-the :ref:`Serial Ports <lang-serial>` language reference page.
-
-Which pins correspond to the USART TX and RX pins are given on your
-board's silkscreen, and also in the board-specific USART pin maps
-available here:
-
-* :ref:`Maple <maple-usart-map>`
-* :ref:`Maple RET6 Edition <maple-ret6-usart-map>`
-* :ref:`Maple Mini <maple-mini-usart-map>`
-
-If you use a particular serial port, you cannot also use its
-communication pins for other purposes at the same time.
-
-Compatible Devices and Specifications
--------------------------------------
-
-We have successfully used the USART ports with an FT232R-based
-USB-serial converter at up to 115200 baud.  Higher speeds should
-certainly be possible.
-
-Recommended Reading
--------------------
-
-* `Wikipedia article on Universal Asynchronous Receiver/Transmitter
-  (USART)
-  <http://en.wikipedia.org/wiki/Universal_asynchronous_receiver/transmitter>`_
-* `Arduino Serial reference
-  <http://arduino.cc/en/Reference/Serial>`_
-* ST `Reference Manual RM0008
-  <http://www.st.com/stonline/products/literature/rm/13902.pdf>`_
-  (PDF), Chapter 27.