[hpsdr] JANUS BoM

[Steven Bible]

Hi Lyle,

What about the serial eeproms used by VESA?

http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=7041&mid=&lang
=en

These devices have two modes: transmit only and bidirectional.  Since these
are designed for plug-and-play, and they are very common parts, might be a
fit?

73,

- Steve, N7HPR
 (n7hpr at tapr.org)



> -----Original Message-----
> From: Lyle Johnson [mailto:kk7p at wavecable.com]
> Sent: Sunday, May 28, 2006 3:17 PM
> To: Steven Bible
> Cc: hpsdr at hpsdr.org
> Subject: Re: [hpsdr] JANUS BoM
>
>
> Hello Steve!
>
> > The DS2431P is used for board identification, correct?  What
> about using a
> > I2C serial eeprom instead as they are more common than the
> 1-Wire(r) parts.
> > I know that there is an 8 device limit in the addressing.
>
> The DS2431P has the advantage of a 64-bit unique ID in each part, as
> well as limited EEPROM storage.  We considered the use of I2C EEPROMs
> early on.  The 8 device limit, the fact that we might have additional
> I2C devices on the boards, the possibility there might be multiple
> instances of one board type in an ATLAS backplane, and the possibility
> of a larger ATLAS backplane with more slots in the future led us to the
> 1-wire parts.  It was not an easy decision, given the relatively high
> cost and limited availability of the parts.
>
> 73,
>
> Lyle KK7P
>


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