diff --git a/notes.md b/notes.md
index fd0c276..3a56b55 100644
--- a/notes.md
+++ b/notes.md
@@ -39,3 +39,7 @@ if you want to monitor prints via SDI, you can use the following instead:
 when flashing standalone with the `wlink` utility, you can simply run the following:
 `wlink -v flash <PATH_TO_BINARY>`
 
+
+# CH32V MISC NOTES
+## SLEEP / DEEP SLEEP
+it turns out you can not put the chip into deep sleep and have it wake up correctly until you power cycle it. WHAT THE FUCK. see page 36 of the [qingkev3 processor manual](https://www.wch-ic.com/download/file?id=368) at the bottom of section 6.1 Enter Sleep