readme update

1 files changed, 2 insertions, 2 deletions

diff --git a/README.md b/README.md
index bd71ca7..923b9de 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Monitor the given address and length, and print the system stack information whe
 
 See example in helloworld.c
 - Add #include "watch.h"
-- Pass in the address and length to monitor, set the threshold, compare way, timer interval (us) etc.
+- Pass in the address and length to monitor, set the threshold, compare way, timer interval (ns) etc.
 - start_watch(watch_arg); to start monitoring
 - Call cancel_watch(); when need to cancel monitoring
 
@@ -43,7 +43,7 @@ typedef struct
     long long threshold;         // threshold value
     unsigned char unsigned_flag; // unsigned flag (true: unsigned, false: signed)
     unsigned char greater_flag;  // reverse flag (true: >, false: <)
-    unsigned long time;          // timer interval (us)
+    unsigned long time;          // timer interval (ns)
 } watch_arg;
 ```