Anyone Used a TMP141 with a PIC (Sensorpath)?

Peter-NMB · Joined: 17 Sep 2003 Posts: 11 Location: Glasgow, Scotland

Has anyone here used the Ti TMP141 Single wire Temperature Sensor before?
If so how did you find using the SensorPath Bus.

http://focus.ti.com/lit/ds/symlink/tmp141.pdf

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

There's not much information available on this bus. Here's one page:
http://www.national.com/nationaledge/jan04/article.html
Down at the bottom, they give a link to a site where supposedly the
specification is available, except it's not there. A web search for the
spec ends up with nothing.

There are no appnotes available on the inventor's website (national.com).

This bus looks to me as if it's an "in house" bus, intended for motherboard
manufacturers. They don't really care about publishing the spec, or
appnotes, or anything. That's my assessment.

Peter-NMB · Joined: 17 Sep 2003 Posts: 11 Location: Glasgow, Scotland

Hi PCM Programmer,
I found a similar situation in regard of acquiring information about sensorpath, I had been on the same link as you had suggested and also spent a fair while navigating around the http://www.dmtf.org to find the specification of which I was unable to locate.
I have since tried to contact Ti (who also have no apps notes) and National, hopefully they will get back to me with information. Initial information given from National is that the technology was given/sold to Winbond though.
(I had just thought since these parts are highly noise immune and relatively low cost due to their applications on motherboards that it would be a good part to use in future applications).
Any info that I acquire I will post, so that anyone interested in Sensorpath can have a wee look. I'll keep searching
Thanks for looking into it though Smile

SET · Joined: 15 Nov 2005 Posts: 161 Location: Glasgow, UK

Hi Peter

Also couldn't find anything on dtmf site - but there was timing information on one of the manufacturers sites (cant remember whether it was TI or National) and it does look very similar to 1-wire at the physical level, although it also has a protocol above that.

I had the same thought too, that these devices might be of use other than on motherboards!

Vic

adrian · Joined: 08 Sep 2003 Posts: 92 Location: Glasgow, UK

Peter-NMB · Joined: 17 Sep 2003 Posts: 11 Location: Glasgow, Scotland

Hi Adrian,
I had been around these pages already, except for the National Page about the details of the Winbond/ National transfer.

the most interesting page that was listed was the

http://lists.lm-sensors.org/pipermail/lm-sensors/2004-August/008631.html

When I found this one however, It gave a lot of links.
I was unable to get the PDF on the link that looked the most interesting when I followed the thread, as the page no longer seems to exist.

http://www.national.com/an/AN/AN-1316.pdf

Thanks Adrian, for looking though. Have you used sensorpath before?

adrian · Joined: 08 Sep 2003 Posts: 92 Location: Glasgow, UK

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

That appnote is about the National PC8374L Super I/O chip.
National has sold that product line to Winbond. It looks like
someone has gone through the appnotes and pulled anything
that applies to the Super I/O product line. Winbond has not
(so far) re-posted the appnote on their webpage. That's why
you can't find it.