Compute Module • Re: does CM4 support 4 simultaneous input with PCM1865 in TDM?

Hello! Please help!

Currently there is a lot of ambiguity around this subject, can someone please asnwer?

Does the CM4 support 4 simultaneous input with the PCM1865 adc in TDM mode?

Open your copy of "bcm2711-peripherals.pdf" or download it from https://datasheets.raspberrypi.com/bcm2 ... herals.pdf
Go to page 110, and read:
"Frames can contain 1 or 2 audio/data channels in each direction. Each channel can be between 8 and 32 bits wide and
can be positioned anywhere within the frame as long as the two channels don’t overlap. The channel format is separately
programmable for transmit and receive directions."

So two channels per direction is the maximum.

Statistics: Posted by fchk — Mon May 05, 2025 5:36 pm

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