From 5d17fbe13cc6baeeb1f54c925a0c67ae60e5f23e Mon Sep 17 00:00:00 2001
From: Marti Bolivar <mbolivar@leaflabs.com>
Date: Fri, 8 Apr 2011 15:56:14 -0400
Subject: Adding CLOCK_SPEED_MHZ and CLOCK_SPEED_HZ as derived board-specific
 values.

---
 source/lang/api/board-values.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/source/lang/api/board-values.rst b/source/lang/api/board-values.rst
index 367adbb..d6d78f6 100644
--- a/source/lang/api/board-values.rst
+++ b/source/lang/api/board-values.rst
@@ -18,6 +18,12 @@ boards.  Some example usages are given :ref:`below
 Constants
 ---------
 
+- ``CLOCK_SPEED_MHZ``: Clock speed of your board, in megahertz
+  (MHz). This is the same as ``CYCLES_PER_MICROSECOND``.
+
+- ``CLOCK_SPEED_HZ``: Clock speed of your board, in hertz (Hz).  This
+  is the same as ``CLOCK_SPEED_MHZ * 1000000``.
+
 - ``CYCLES_PER_MICROSECOND``: Number of CPU cycles per microsecond on
   your board.
 
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