The link layer is able to run both on 8- and 16-bit links, and if a upper half of a 16-bit link is non-functional, it will automatically revert to using the 8 lower bits. | The link layer is able to run both on 8- and 16-bit links, and if a upper half of a 16-bit link is non-functional, it will automatically revert to using the 8 lower bits. |