Tool/software:
Hi experts,
Currently we are planning to use the I2S interface that is emulated using the PRUs on I2S.
However, it seems like we cannot provide the I2S signals Fsync & BCLK for TAS2781,
Is there any Audio Converter that can provide these signals to create a point to point connection with AM261 PRUs so that we can the audio amplifier connected to AM261x directly ?
Regards,
Alex
Hi Alex,
The device clocking is derived from the SBCLK input clock. The tables below show the valid SBCLK clock
frequencies for each sample rate and SBCLK to FSYNC ratio.
If the sample rate is properly configured via the SAMP_RATE[2:0] register bits, no additional configuration is
required as long as the SBCLK to FSYNC ratio is valid. The device will detect improper SBCLK frequencies and
SBCLK to FSYNC ratios and volume ramp down the playback path to minimize audible artifacts. After the clock
error is detected, the device will enter a low power halt mode after a time set by CLK_HALT_TIMER[2:0] register
bits if DIS_CLK_HALT bit is low. Additionally, the device can automatically power up and down on valid clock
signals if CLK_PWRUD register bit is set to high. The device sampling rate should not be changed while this
feature is enabled. In this mode the DIS_CLK_HALT bit register should be set low in order for this feature to
work properly.
