Update README.md

README.md

@@ -21,6 +21,8 @@ Latest version of the GCC ARM toolchain is recommended for building the bootload
 * Automatic when flashing with TKG-FLASH if the right com port is given to toggle DTR (not always reliable)
 * BOOT1 set to HIGH (permanent with jumper set fro ultimate case !)
 * Writing the value **0x424C** in the DR10 backup register (ex : from you own firmware before rebooting) 
+* A START command from TKG-Flash tool
+
 
 <img alt="TKG Bootloader logic" style="border-width:0" src="https://github.com/TheKikGen/stm32-tkg-hid-bootloader/blob/master/doc/TKG-HID-BOOTLOADER%20LOGIC.png?raw=true" /></a>