AVR-Chat

Folks, I thought I had the tool to identify this part but, alas, I
cannot find it nor relocate the tool online.

This component is in a Logitech V400 optical mouse along with a
ATMega168V, Philips PLN-2020 (the real object of the chase) and an
nRF24L01.  Can anyone help determine what U6, a 10-pin TSSOP, etched
"DAR R1E" is?  1.5MB image: http://rightime.com/images/Misc/dscn5145a.jpg

Thanks.


Tom

> ... U6...

Actually, it's a 10-µSOIC.


Tom

did not find your part yet but did fing this interesting link

http://www.mstarmetro.net/~rlowens/OpticalMouse/

still looking

mj

--- In AVR-Chat@yahoogroups.com, "Tom Becker" <gtbecker@...> wrote:
>
> Folks, I thought I had the tool to identify this part but, alas, I
> cannot find it nor relocate the tool online.
> 
> This component is in a Logitech V400 optical mouse along with a
> ATMega168V, Philips PLN-2020 (the real object of the chase) and an
> nRF24L01.  Can anyone help determine what U6, a 10-pin TSSOP, 
etched
> "DAR R1E" is?  1.5MB image: 
http://rightime.com/images/Misc/dscn5145a.jpg

> 
> Thanks.
> 
> 
> Tom
>

> ... http://www.mstarmetro.net/~rlowens/OpticalMouse/

Yup, a good link.  It lacks any concrete information on the Philips 
PLN-2020 - and nothing seems to be publicly available from them 
(consistent with my experience with Philips, which doesn't respond to 
tech requests), hence an attempt to reverse-engineer any hints.  The 
part is interfaced via SPI so, I suppose, I could watch that exchange 
with an analyzer; uggh.

I'm now thinking that the part I can't identify is probably a power 
supply.  It is surrounded (on the board obverse side) by a few large 
capacitors and two inductors, perhaps to pump the 1.5v AA-cell to 5v for 
the PLN-2020.

Thanks for your effort, Michael.


Tom

A followup:

Today I received a datasheet from Philips that provides a little more
information about the PLN-2020 Twin-eye laser motion sensor.  In it is
this:
"In order to support a wide field of applications the PLN2022 twin-eye
laser sensor is equipped with a 2k random access memory (RAM) that has
to be programmed each time the sensor is powered up. As long as the
power supply remains uninterrupted, the code is kept in memory.  Philips
Laser Sensors will deliver this customer specific RAM code."

This is new in my experience.  The sensor and its necessary
factory-supplied proprietary firmware have been separated and must be
combined at each powerup by the host.  Shades of drivers, but peripheral
microcode instead.

Will our machines need to be Internet-connected soon so that our sensors
get the latest, licensed, firmware?





[Non-text portions of this message have been removed]

This is also true of many of the "modern" programmable logic devices.  
It may well be something like this that they are talking about. The  
logic chip has an associated "configuration memory".

Jim Wagner

On Jan 8, 2008, at 4:41 PM, Tom Becker wrote:

> A followup:
>
> Today I received a datasheet from Philips that provides a little more
> information about the PLN-2020 Twin-eye laser motion sensor. In it is
> this:
> "In order to support a wide field of applications the PLN2022 twin-eye
> laser sensor is equipped with a 2k random access memory (RAM) that has
> to be programmed each time the sensor is powered up. As long as the
> power supply remains uninterrupted, the code is kept in memory.  
> Philips
> Laser Sensors will deliver this customer specific RAM code."
>
> This is new in my experience. The sensor and its necessary
> factory-supplied proprietary firmware have been separated and must be
> combined at each powerup by the host. Shades of drivers, but  
> peripheral
> microcode instead.
>
> Will our machines need to be Internet-connected soon so that our  
> sensors
> get the latest, licensed, firmware?
>
>

> [Non-text portions of this message have been removed]
>
>




[Non-text portions of this message have been removed]