PCM1865-Q1: Research of new architecture

Hello!

You caught us over the holiday weekend so it took a little longer than usual to get to this one. 

Multi-drop TDM buses are very common and at a high level, this should work fine.  The SDOUT line of the processor will control the DAC/AMP outputs and the SDIN will receive the information from the ADCs. 

Some things to consider would be to verify that all the devices on the bus use the same TDM BCLK-to-FSYNC offsets and FSYNC pulse width requirements.  

Note that the PCM1865 is a 4-channel ADC so you'd need two devices to acquire 6x microphones + Stereo (2-ch) AUX.  Also note that we have a newer family, the TLV320ADC6140, 5140, 3140 devices which have some improved features and capabilities vs. the PCM186x family.

Hi, Collin! Thank you for the answer!

Can you advice me on the PCM1690 EVM?

About 4-channel ADC (PCM1865): 8 mono analog inputs -> 6 mic mono inputs and 1 stereo AUX input

About TLV3206140: Required only automotive rating

I saw PCM6340-Q1 (4 mono analog inputs), what are the benefits of using ADC data (compared to PCM1865)? and can I connect 2 such ADCs to one TDM bus?

Hi, Collin!

Can you advice me on the PCM1690 EVM?

Hi, Paul!

I'll write a little later! Thank you!

Can you give me a guidelines of multi-drop TDM bus (HW&SW)?

If I understood correct, PCM1690 isn't compatible with TAS6424MS (PCM1690 hasn't SAI).

For my understanding: I want to connect 2 devices - DAC and Amplifier - on the same bus. At the entrance to them, I transmit 8 different signals (channels) over the data bus. Each of these devices can select any signal to use, for example: 1-8 signals are used by the DAC and 1-4 signals are used by the amplifier

The PCM1690 only supports TDM8, so they can share a bus.  The channels are set to play a specific, static channel (VOUT0 plays TDM slot 0, VOUT1 plays TDM slot 1, etc.).

TDM can be selected in the software mode or hardware mode using the FMT pins.

Hi, Paul! Thank you for your answers! Could you give me schema or guidelines of connection PCM1690 & TAS6424MS using a share bus (SAI)? 

Good afternoon, Dear friends!
We require confirmation of the connection diagram of the components of your production. Please give your comments and recommendations on the connection diagram and possible problems that you see from your side. All components are required to be connected in TDM mode.

Best Regards,

George