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-rw-r--r--doc/usage/cmd/cp.rst3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/usage/cmd/cp.rst b/doc/usage/cmd/cp.rst
index 12a24e19fee..67360e30e41 100644
--- a/doc/usage/cmd/cp.rst
+++ b/doc/usage/cmd/cp.rst
@@ -19,7 +19,8 @@ Description
The cp command is used to copy *count* chunks of memory from the *source*
address to the *target* address. If the *target* address points to NOR flash,
-the flash is programmed.
+the flash is programmed. When the *target* address points at ordinary memory,
+memmove() is used, so the two regions may overlap.
The number bytes in one chunk is defined by the suffix defaulting to 4 bytes: