I'm hoping someone can either verify or clarify my understanding of interfacing an Audio D/A converter to a device that sends audio over I2S.
I have an Audio Codec chip, the VS1063A (Datasheet), that is capable of sending 16 bit I2S data to an external DAC. Unfortunately, the VS1063A is constrained to 16 bits per channel, which means the bit clock runs at 32fs. Most Audio DACs require a minimum bit clock of 48fs.
For instance, TI's PCM1748 (Datasheet) states:
BCK can be operated at 32 (16-bit, right-justified only), 48, or 64 times the sampling frequency.
I found a different Audio DAC from TI, the PCM5101A (Datasheet) which seems promising, but I want to confirm my understanding. The datasheet states that it has an "integrated High-Performance Audio PLL With BCK Reference To Generate SCK Internally." Furthermore, it says
So here's my question: Unlike the PCM1748, which requires a 4 wire I2S interface (the forth being SCK) with some additional circuity to play the 32fs format coming out of the VS1063A, will the PCM5101A accept the 32fs format because of its ability to generate SCK internally?
Any feedback would be appreciated.