Richard
Have you checked out the  Nordic gear? http://www.nvlsi.no
They offer a range of RF chips with & without buit-in CPUs (8051 style)
Cost may be greater than you want though - can't remember what we were
quoted but it was pretty competitive considering that pretty well
everything we wanted was on-chip. But I think it was more than $3.50
for the 2.4GHz stuff anyway.

Pity that project was cancelled.

Richard P

On 07/02/07, Richard J. Pytelewski <rjp_psi@comcast.net> wrote:
> Price is  a real consideration.  I looked at the MC's KeeLoq system since it
> incorporated the uC with it.  The Linx encoders/decoders are about $3.50
> each; $7.00 a system, which is greater than my target price for the uC +
> encoder.  I'm not trying to encode really sensitive data only looking to
> ensure proper system operation .... I'm really leaning toward a proprietary
> software generated code and moving on.   I am still awaiting the reply from
> MC, though.
>
> Thanks for the help!
>
> Rich
>
> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
> Of alan smith
> Sent: Tuesday, February 06, 2007 7:52 AM
> To: Microcontroller discussion list - Public.
> Subject: RE: [PIC] KeeLoq PICS and RF Secure Transmission
>
>
> Whats your target cost?  Look at LINX....they sell the encoders/decoder
> chips and can create a rolling code address as well, on the fly (need to
> sync the rec with the tx tho).
>
> "Richard J. Pytelewski" <rjp_psi@comcast.net> wrote:  Alan:
>
> I am using a data ... and no rolling code required. The data will be a
> single byte.
>
> I have not received a reply from Microchip on my Keeloq application and am
> starting to look at workarounds (the encoders and decoders I've found (not
> many around) are costly for the application). I'm considering using a hard
> encoded value to use as a header to communicate with the receiver (my own
> design as well). Since there may be multiple transmitters (users decision),
> I'm considering adding a secondary unique address (3 bit; 8 addresses) to
> the transmission header and hard code the receivers to act according to the
> input. I think that'll work for this application.
>
> This idea seem workable? Any other encode / decode ideas?
>
> Thanks!
>
> Rich
>
>
>
> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
> Of alan smith
> Sent: Monday, February 05, 2007 10:44 AM
> To: Microcontroller discussion list - Public.
> Subject: Re: [PIC] KeeLoq PICS and RF Secure Transmission
>
>
> Do you need a rolling code security arrangement? What kind of data are you
> transmitting..ie...control signals or an actual data stream?
>
> "Richard J. Pytelewski" wrote: Has anyone gone thru
> the hurdles of implementing KeeLoq security in Pics? I
> am needing to RF data transfer and KeeLoq looks possible for new product
> development. Microchip requires a Confidentiality Agreement. They
> apparently send you a disk with code. Are there license fees involved? Any
> experience in their ease of incorporation into programs? Looking at their
> datasheets it looks like its proprietary code that is incorporated into your
> program.
>
> Are there any other security chips I should consider. As always, cost is an
> issue. Any help and input would be appreciated.
>
> Rich
>
> PSI Systems
>
>
>
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
>
>
> ---------------------------------
> Expecting? Get great news right away with email Auto-Check.
> Try the Yahoo! Mail Beta.
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
>
>
> ---------------------------------
> No need to miss a message. Get email on-the-go
> with Yahoo! Mail for Mobile. Get started.
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist