Brad Hards wrote:
>
> Jose Ignacio Gijon Soriano wrote:
> > On Thu, 6 Apr 2000, J�rg Heckenbach wrote:
> > > The Hauppauge WinTv has this hardware structure.
> > >
> > > <usb>---(nt1003-1)-+-(saa7111a)-+-(fm1216)--<antenna input
> > > | +-----------<direct input
> > > |
> > > <line in>--------(4052)---------+-----------<direct audio in
> > > +-----------<audio from tuner
> > >
> >
> > The miro PCTV is exactilly the same you have draw. I'm not sure now
> > about de audio part as I don't have the device here and have not yet
> > begin to work with that part.
>
> I think that this is basically the NogaTech reference design (based on
> the information in "USB by Example" by John Hyde) - at least the video
> part anyway.
> Can you guys confirm that the NT1003 is providing the I2C bus mastering,
> and that the SAA7111A (video codec) and FM1216 (analog front end?) are
> I2C bus slaves.
Yes. NT1003 is the master and SAA7111A and FM1216 are the slaves. That's
the
information from the NT1003 data sheet and I've verified it with a few
code lines
in wintv_i2c_[read|write].
> Is the 4052 an audio codec? Is it also I2C controlled?
The CD4052B is a dual 4-channel analog multiplexer/demultiplexer which
is controlled by two
digital input pins. This Pins are connected with IO1 and IO2 (Pin 38+39,
Open Drain) of the NT1003.
The IO Pins are controlled by register 6 (IOPIN_REG). The audio signal
is not coded but send through an Amplifierer (TDA1308) to the line in of
the pc's sound card.
> Do you also need HID out to set up the NT1003 and other devices?
>
At the moment I'm not sure if we need HID out.
Cheers
Joerg Heckenbach
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