Data Matrix Barcode is not scannable when it is printed in rectagular shape, but it is scannable when printed as a square barcode.
 
##rectangular data matrix barcode
^FO650,570
^BXN,9,200,,,,,2
^FD
XX           4 82105    14656                 RT           
^FS
 
 
##square data matrix barcode                       
^FO650,800
^BXN,9,200,,,,,1
^FD
XX           4 82105    14656                 RT           
^FS