IP customization options in the Optional Features tab are described in the following subsections. The use of each of these features is optional. You need not customize the options for a given feature if your application does not use that feature. See the UltraScale Architecture GTH Transceivers User Guide (UG576) [Ref 1] or UltraScale Architecture GTY Transceivers User Guide (UG578) [Ref 2] for details on the relevant serial transceiver features. The layout of the Optional Features tab with the Receiver comma detection and alignment section expanded is shown in This Figure .