Re: Gah! Data sheets.

On a sunny day (Thu, 26 Sep 2024 12:46:05 +0800) it happened Sylvia Else
<sylvia@email.invalid> wrote in <llk78cFl0tbU1@mid.individual.net>:

I was looking at building a remote controlled volume control for use at
home. Probably won't happen, but I came across this device:
>
https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/NJU72344_E.pdf
>
Page 7 gives the serial protocol. It mentions S and P bits, but as far
as I can see they're nowhere else defined.
>
Further down the page, it describes an auto-increment function. That is
the only mention.
>
At the bottom of the page it talks about the consequence of an audio
signal being inputted (sic) before (during?) power on. Hard to know
exactly what the intent is, but based on that, I'd be concerned that the
device might latch up, or otherwise misbehave, if there's any input
before power on. Be great to build a bunch of boards with this and then
discover that some proportion are flaky.
>
How many designers would conclude that this could be more trouble than
it's worth, and find something else?
>
Sylvia.

ebay is full of that sory of things, maybe something like this?
 https://www.ebay.nl/itm/143317203390
6 dollar 38 cents including 20 cm cable and button...

googling a bit may be worth it.