In UM11126, the LPC55S6x I2S interface features description:
TDM with a several stereo slots and/or mono slots is supported. Each channel pair can act as any data slot. Multiple channel pairs can participate as different slots on one TDM data line.
But I checked the latest SDK_2.6.3_LPC55S66.zip, can't find any TDM driver or demo to show how use TDM feature. Any comment for TDM peripheral driver in LPC55S66?