Coax digital out ?

[u301021]

If i want to make a S/PDif coaxial digital out from a TC94A14FAG, how do i do that ?

Pin 4 is Dout and i have tried to connect a spdif buffer board (picture) to that point (and pin 7 gnd) but theres no signal

Do you have any idea ?


TC94A14FAG

Buffer board

And my attempt 🙄

 

[Markw4]

Looks like some of the documentation for that chip was never released publicly. The datasheet does not contain detailed information about programming and interfacing the device. Rather as is sometimes the case for microprocessors, the datasheet only contains mechanical and basic electrical specifications.

 

[u301021]

Hmm, anything i can do to make a electric digital out (S/Pdif coax) ?

 

[Markw4]

If a scope shows what looks like SPDIF on pin-4, then chances would seem good to get it interfaced to a dac. If that output is disabled in software, then that might be a show stopper.

 

[u301021]

Ok, thank you, i will try to put a scope on Pin 4 and 7 and see

 

[u301021]

There was no signal out from pin 4 (and 7)
So i will take an analog out from the build in dac WM 8725 and hope that the USB function also runs through that dac, so i can have that function to

But thanks ;-)