Tastitalia-RK3568-SBC.md

@@ -8,13 +8,9 @@ Welcome to the Tastitalia RK3568 SBC User Manual. This manual provides comprehen
 - [Introduction](#introduction)
 - [Hardware Manual](#hardware-manual)
 - [User Manual](#user-manual)
-  - [Downloading Pre-compiled Images](#downloading-pre-compiled-images)
   - [Power Supply](#power-supply)
   - [Booting](#booting)
-  - [Cortex-A Serial](#cortex-a-serial)
-  - [Cortex-M Serial](#cortex-m-serial)
-  - [Jumper CN1 and CN5](#jumper-cn1-and-cn5)
-  - [CN4 (User Button)](#cn4-user-button)
+  - [Debug Serial](#debug-serial)
   - [USB OTG](#usb-otg)
 
 # Introduction