[hpsdr] Blackfin

[J.D. Bakker]

At 07:47 -0400 12-07-2007, Philip Covington wrote:
>On 7/12/07, Chris Albertson <chrisalbertson90278 at yahoo.com> wrote:
><snip>
>  > The cost of these DSP processors is getting to be lower than the cost
>>  of
>  > building a high speed interface.  What does the current HPSDR's USB
>  > interface cost?  The Blackfin is $14.51.
>
><snip>
>
>Unfortunately it does not cost only $15.  There is a lot of support
>circuitry that must go around that chip and when you start adding all
>the costs up you into the $150-$250 range (in parts cost alone) for a
>board that has the necessary hardware on it to support SDR
>applications.

Hardly.

I originally designed and used the LART (see .sig) as an SDR 
platform. To build a similar BF-based board, you'd need:

Processor: US$14.51
32MB SDRAM: US$7.13
4MB Boot flash: US$2.37
FET for core supply: US$0.91
Inductor for core supply: US$1.27
Serial transceiver for debug interface: US$1.38
Pin headers, decoupling caps: ~US$5
(all prices are Digi-Key, qty 1)

That's US$32.57 without the PCB and the Atlas connector, assuming 
that Atlas supplies 3v3. Add ~$10 for Fast Ethernet.

JDB.
-- 
LART. 250 MIPS under one Watt. Free hardware design files.
http://www.lartmaker.nl/

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