[lkml]   [1999]   [Mar]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectPT2254A - Anybody know this chip?


I'm trying to hack sound volume control for the leadtek WinView TV/FM.
I now have just about everything sorted out, except the sound volume.

I know that the volume is programmed serially on a three wire interface
using a chip marked PT2254A the logo is the letters PTC inside a balloon.

I can't find any reference to this chip, I believe it is a two channel
serially programmed volume control. But I haven't been able to guess the
programming protocol, I can change the volume, but the same byte sequence
never works twice!

If anyone can help me locate the makers or a datasheet for this chip I would
very much appreciate it.



To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:50    [from the cache]
©2003-2011 Jasper Spaans