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-rw-r--r--source/i2c.rst6
1 files changed, 3 insertions, 3 deletions
diff --git a/source/i2c.rst b/source/i2c.rst
index 670b91d..a206ed4 100644
--- a/source/i2c.rst
+++ b/source/i2c.rst
@@ -72,6 +72,6 @@ Recommended Reading
* `I2C Bus <http://www.i2c-bus.org/>`_
* `Wikipedia: I2C <http://en.wikipedia.org/wiki/I%C2%B2C>`_
-* `Arduino I2C/TWI reference <http://www.arduino.cc/playground/Learning/I2C>`_
-* ST `Application Note on Advanced I2C Usage
- <http://www.st.com/stonline/products/literature/an/15021.pdf>`_ (PDF)
+* `Arduino I2C/TWI reference <http://www.arduino.cc/en/Reference/Wire>`_
+* ST `Application note STM32F10xxx I2C optimized examples
+ <http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/CD00209826.pdf>`_ (PDF)