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Diffstat (limited to 'nuttx/arch/arm/src/samd/chip/sam_gclk.h')
-rw-r--r--nuttx/arch/arm/src/samd/chip/sam_gclk.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/samd/chip/sam_gclk.h b/nuttx/arch/arm/src/samd/chip/sam_gclk.h
index ded483ca8..312982a4c 100644
--- a/nuttx/arch/arm/src/samd/chip/sam_gclk.h
+++ b/nuttx/arch/arm/src/samd/chip/sam_gclk.h
@@ -4,6 +4,10 @@
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
+ * References:
+ * "Atmel SAM D20J / SAM D20G / SAM D20E ARM-Based Microcontroller
+ * Datasheet", 42129J–SAM–12/2013
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met: