The transmitter audio peripherals provide a dedicated Audio Clock Regeneration (ACR) input interface.
The audio clock regeneration architecture is not part of the HDMI 1.4/2.0 TX Subsystem. You must provide an audio clock to the application. This can be achieved by using an internal PLL or external clock source, depending on the audio clock requirements, audio sample frequency and jitter. When the HDMI 1.4/2.0 TX Subsystem is used in DVI mode, the ACR inputs are ignored. You can decide to leave them open or connect them to some fixed values (for example, connecting acr_cts, acr_n, and acr_valid to 0).