[linux-dvb] stv0299: explanation of 08 and 0c registers [rev 2.3]

Jeremy Hall jhall at maoz.com
Thu Jul 21 04:55:18 CEST 2005


well I'm using the hauppauge nexus rev 2.3, so whatever bits are in that.

_J

In the new year, Andrew de Quincey wrote:
> On Wednesday 20 July 2005 01:55, Jeremy Hall wrote:
> > In the new year, Johannes Stezenbach wrote:
> > > Jeremy Hall wrote:
> > > > I am looking at some code that attempts to change the voltage within
> > > > 8ms.  I recently swapped
> > >
> > > The registers are described in the stv0299 data sheet, but that
> > > alone doesn't help you because you need to know the circuit around
> > > the stv0299 to set them. This should be specifed in the frontend
> > > (tin box) data sheet.
> >
> > What does the "tin box" datasheet mean?
> 
> You need a seperate manual for the tinbox on the card as well as the frontend 
> manual. It tells you the specifics that the particular manufacturer has used 
> in construction of the tinbox - e.g. what GPIOs are used to control the 
> analogue frequency-dependant circuitry.
> 
> What is the manufacturer's details on the tin box? I might have the doc lying 
> about...
> 
> > I'm used to seeing datasheets that say:
> >
> > In order to set the voltage, set the following registers under the
> > following constraints and here's what the bits mean.
> 
> Hmm, it seems very rare to get that - in my experience anyway :( Hence the 
> multimeter comment.
> 
> > Are you willing to help me debug this?
> 
> I'll try and help as well if you want.
> 





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