Part Number: TUSB3200A
Hello all,
I linked to a quite similar question https://e2e.ti.com/support/dsp/c5000/f/109/t/666140?TUSB3200-TUSB3200A-VS-TUSB3200.
I have the same problem. We have an old design with the old http://www.ti.com/product/TUSB3200A.
This one is obsoleted, also the older one TUSB3200 but we can get some of this to go on with the existing design.
As far as we understand they are more less similar but the channel mapping is different.
We use 8 channel out with TUSB3200A. If I pass a interleaved PCM data stream 7.1 from the host PC to the device the channel mapping is like this:
Ch1 -> LEFT
Ch2 -> RIGHT
Ch3 -> CENTER
Ch4 -> SUB
Ch5 -> REAR-L
Ch6 -> REAR-R
Ch7 -> SIDE-L
Ch8 ->SIDE-R
Or if you just want to play back STEREO:
Channel 1 is LEFT:
Channel 2 is RIGHT:
Which is like expected
If we replace the current 3200A with the older one 3200 the channel mapping changes to:
Ch1 -> LEFT
Ch2 -> REAR-L
Ch3 -> RIGHT
Ch4 -> REAR-R
Ch5 -> CENTER
Ch6 -> SIDE-L
Ch7 -> SUB
Ch8 ->SIDE-R
Or if you just want to play back STEREO:
Channel 1 is LEFT:
Channel 3 is RIGHT:
Which is not expected and a problem or us.
So our questions are:
- Is the observation correct and the channel mapping is one of the difference between those two chips ?
- can we change this via firmware ?
- Any other suggestions ?
Thank you very much !
With best regards,
Mark