48.6.4.2 Frame-Oriented Configuration

If SPDIFTX_MR.CMODE=3, SPDIFTX_EMR.CSM is set to ‘1’ and SPDIFTX_EMR.UDM is set to ‘1, then the Channel Status bit and the User Data bit to send are supplied with the data written in SPDIFTX_CDR. The fields SPDIFTX_CDR.CS and SPDIFTX_CDR.UD indicate the value to send in the subframe.