I2S to Toslink

I need an optical audio output from a unit that only has analogue left and right.If you need to know it's one of these......

**broken link removed**

I've found the digital audio out pin on the main audio processor which is in I2S format.Can I use this to directly drive a standard 3 pin Toslink transmitter, or does it involve other components as well?

https://en.wikipedia.org/wiki/TOSLINK
https://www.epanorama.net/documents/audio/spdif.html
I think (not certain) that in my digital recorders the i2s is connected to fiber (toslink) transmitter/receiver.

Ok thanks Ron.

So can anyone else confirm for me (my brain will catch fire if I read through that lot) if I2S is purely internal and PCM will always be external digital audio?