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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 baud rate with the line voltage level relative to
-ground. Their usage is documented in the :ref:`Serial Ports
-<lang-serial>` language reference page.
+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