SLOS948 February 2019 TAS6424M-Q1
The device incorporates both DC-load and AC-load diagnostics, which are used to determine the status of the load. The DC diagnostics are turned on by default, but if a fast startup without diagnostics is required, the DC diagnostics can be bypassed through I2C. The DC diagnostics runs when any channel is directed to leave the Hi-Z state and enter the MUTE or PLAY state. The DC diagnostics can also be enabled manually to run on any or all channels. DC Diagnostics can be started from any operating condition, but if the channel is in PLAY state, then the time to complete the diagnostic is longer because the device must ramp down the audio signal of that channel before transitioning to the Hi-Z state. The DC diagnostics are available as soon as the device supplies are within the recommended operating range. The DC diagnostics do not rely on the audio input clocks to be available to function. DC Diagnostic results are reported for each channel separately through the I2C registers.