On Friday 01 April 2011, Yeoh Chun Yeow wrote:
> Just to confirm adm6996fc is similar to adm6996m or adm6996f.
I always thought the F and FC were more similar the the M, but
I have no evidence for that.

David
> 
> On Fri, Apr 1, 2011 at 5:34 PM, David Goodenough <
> 
> david.goodeno...@linkchoose.co.uk> wrote:
> > On Friday 01 April 2011, Peter Lebbing wrote:
> > > On 01/04/11 03:27, Yeoh Chun Yeow wrote:
> > > > Ok I found the script.
> > > > 
> > > > read-all-adm output attach.
> > > 
> > > Thanks very much. It's not vital, but if you still have the setup
> > > ready, could you remove the VLAN related config from your
> > > /etc/config/network
> > 
> > and
> > 
> > > run the script again? It would be helpful if the driver didn't
> > > configure VLANs before running the register dumping script.
> > > 
> > > Other than that, I've had a quick look, and it doesn't make me happy.
> > 
> > First
> > 
> > > and foremost, the product ID for the FC and M chips is identical down
> > > to the last bit! They reserve a whopping 32 bits for a "Chip
> > > Identifier" and still they both read 0007:1023! So there doesn't seem
> > > to be a standard
> > 
> > way
> > 
> > > to tell the chips apart.
> > 
> > Well I suppose if all else fails it will have to be a module parameter,
> > but that would definitely be second best.
> > 
> > David
> > 
> > > And they do seem to differ, which makes sense. There is a lot in
> > > common.
> > 
> > I
> > 
> > > could really use the datasheet for the -FC variant, but all the
> > > so-called datasheets for that chip I've found describe a completely
> > > different device.
> > 
> > Its a shame that Ubiquiti, who after all ship Openwrt with their board,
> > can not be prevailed upon to provide some information.
> > 
> > Over time I have accumulated three adm6996 datasheets, one for the L
> > variant,
> > one for M and one for F (but not FC).  The M one is vast (7MB), but the F
> > is small (700K) and the L 1.7M.  I can email them to you direct if you
> > want as I suspect the list would not appreciate them being broadcast.  I
> > have no idea where I got them from although none are marked confidential
> > so they should be freely distributable.
> > 
> > David
> > 
> > > I even get the impression that the values read from your chip aren't
> > > the power-on-reset default values. Perhaps there's an EEPROM attached
> > > with settings specific to your router.
> > > 
> > > I do see one possibility for hope. Maybe Infineon at some point stopped
> > > producing the real FC variant described in those datasheets I found,
> > > and from then on simply relabeled their M chip and sold that as the FC
> > > variant. Discrepancies in default values could be explained by an
> > > EEPROM with router-specific settings.
> > > 
> > > Thanks for your help,
> > > 
> > > Peter.

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