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-rw-r--r--src/itm.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/itm.rs b/src/itm.rs
index 02ada53..0e32e3c 100644
--- a/src/itm.rs
+++ b/src/itm.rs
@@ -1,4 +1,6 @@
//! Instrumentation Trace Macrocell
+//!
+//! **NOTE** This module is only available on ARMv7-M and newer
use core::{fmt, mem, ptr, slice};