Winbond WTS-701 TTS Question

[John Sorensen]

Has anyone any experience with Winbond's WTS-701 Text to speech chip? My problem (well, it's not really a problem, per se) is that the speaker and analog outputs are not able to be powered up/powered down as described in the datasheet. They're on all the time. I am able to write to the control registers, and read back the correct (just written) value, but it doesn't seem to affect the outputs' performance. Writing to the volume register affects both the speaker's output and the analog output output simultaneously, whereas I would think that should only affect the speaker...

j.

 

[Russlk]

I don't understand how you think the analog output is seperate from the speaker? Doesn't the analog output drive the speaker?

 

[John Sorensen]

The WTS-701 has a speaker output and an analog output. In the control register there are bits that are supposed to power up/down either individually. I probably should have called it the aux output. Sorry for the confusion.

j.

 

[John Sorensen]

In case anyone cares, the chip has to be in IDLE mode to power down the aux output. I think the speaker powers itself up whenever converting. Not sure about that. But I was able to power down the aux output. Apparently, the aux out level tracks with the volume.

j.