Update README.md file

configuration/samples/minimal/README.md

@@ -35,3 +35,10 @@ For example, if you create project with C++ option and CC-RX compiler, you will
 	_ebss = .;
 	_end = .;
 } > RAM
+
+2.3. If you are using RX72N Envision Kit, after the project generation is completed, please do the pin assignment check for SCI.
+In Smart Configurator editor (<projectname>.scfg)
+- go to Pins tab
+- at Pin Function, select SCI channel being used on the left panel (channel with opened blue box)
+- on the right panel, check and change the pin function if it is incorrect: 
+  RXDx and TXDx should be used but the default setting could be SMISOx and SMOSIx