C6455 or C6416 DSK?

Jigar-

> I have following three options with respect to C64x DSK purchase:
> (1) Buy C6416 DSK which has TMS version of C6416 (c64x core).
> (price $495).
> (2) Buy C6455 DSK which has TMX version of C6455 (c64x+ core).
> (price $495).
> (3) Wait for release of TMS version of C6455. But don't know when it
> will be available? and will C6455 DSK price increase if DSK
> incorporates TMS version of C6455 in future?

DSK price is not likely to change vs. silicon revision. TI sometimes
loses money on DSK boards, but if so then it's considered a marketing
expense. Their objective is to sell chips in high qty, DSK is a tool not
their product.

-Jeff

> --- In c..., "presciutti_dgl2k"
> wrote:
>
>> Unfortunately NO, this is the problem.
>> As you can see on this webpage
>> http://focus.ti.com/docs/prod/folders/print/tms320c6455.html
>> in the section "Pricing/Packaging" you can see that only TMX device
>> are available.
>> I don't know when TMS devices will be available!
>>
>> Regards
>> Gio
>> --- In c..., "jigs_dsp" wrote:
>> >
>> > Thanks all for valuable inputs.
>> >
>> > My further analysis is as follows:
>> > Datasheet and Product web page of TMS320C6455 DSP refers TMS
> version
>> > and silicon revision 2.0. Is TMS version of TMS320C6455 DSP
>> > available?
>> > http://focus.ti.com/docs/prod/folders/print/tms320c6455.html
>> >
>> > Thanks and Regards,
>> > Jigar.
>> >
>> >
>> > --- In c..., "presciutti_dgl2k"
>> > wrote:
>> > >
>> > > Every advise is very accepts.
>> > > Anyway, I'm very curious to know if TMX320C6455 works well.
>> > > That is, TI speak about some benefit:
>> > > - 20% higher cycle performance improves overall system
> performance
>> > > - 20-30% smaller code size reduces system cost
>> > > - Better Debug
>> > > is it true?
>> > > More, is serial RapidIO Bus reliable interconnection?
>> > > And what about DDR2 memory controller?
>> > >
>> > > Have someone some experience on this device?
>> > > This should be very important for my future prototype design.
>> > >
>> > > Thanks all
>> > > Gio
>> > >
>> > >
>> > >
>> > > --- In c..., "Bhooshan Iyer"
> wrote:
>> > > >
>> > > > Lakshman--
>> > > > I think the discussion was not on software development. If it
>> > were
>> > > so,
>> > > > your advice is valid.. The discussion I believe was on
>> > > > prototype/system design using C6455.
>> > > >
>> > > > --Bhooshan
>> > > >
>> > > > On 7/5/06, Lakshman wrote:
>> > > > > Hi,
>> > > > >
>> > > > > If you are developing advanced video applications go
>> > > > > for C6455(C64x+ core).You can reuse this code for
>> > > > > OMAP2430/OMAP3430 platforms since the IVA2 is based on
>> > > > > C64x+. C6416 DSK is obsolete now and it's not widely
>> > > > > used for video applications.
>> > > > >
>> > > > > Thanks and regards,
>> > > > > -Lakshman
>> > > > >
>> > > > > --- Bhooshan Iyer wrote:
>> > > > >
>> > > > > > Jeff/Gio/Jigar--
>> > > > > >
>> > > > > > Great thread.Thanks for all the valuable info.
>> > > > > >
>> > > > > > --Bhooshan
>> > > > > >
>> > > > > > On 7/5/06, Jeff Brower
>> > > > > > wrote:
>> > > > > > >
>> > > > > > > Gio-
>> > > > > > >
>> > > > > > >
>> > > > > > > > of sure C6455 is the best choice for video and
>> > > > > > imaging applications
>> > > > > > > > for many reasons: DSP Core match more powerful,
>> > > > > > 2MB of internal
>> > > > > > > > memory, DDR2 interface, RapidIO interconnection
>> > > > > > and so on (you can
>> > > > > > > > find more information on TI web site).
>> > > > > > > > Unfortunately C6455 DSPs are an experimental
>> > > > > > products (designated as
>> > > > > > > > TMX) that are in the formative or design phase
>> > > > > > of development. Then,
>> > > > > > > > you can found unexpected problems when you use
>> > > > > > it. For these reason I
>> > > > > > > > had chosen C6414 DSP (TMS prefix: Fully
>> > > > > > qualified production device)
>> > > > > > > > for my project.
>> > > > > > >
>> > > > > > > This is excellent advice. For engineers
>> > > > > > considering to design with 6455
>> > > > > > > at this time, here are some prototype suggestions
>> > > > > > you're not likely to
>> > > > > > > read on TI website:
>> > > > > > >
>> > > > > > > -bring out all unused pins to test-point; TI may
>> > > > > > make
>> > > > > > > a change and need to use the pins in some
>> > > > > > different
>> > > > > > > way
>> > > > > > >
>> > > > > > > -allow for easy change to oscillator rate, in case
>> > > > > > > TMX part is not operating correctly at specified
>> > > > > > > frequencies
>> > > > > > >
>> > > > > > > -make sure power supply / switching regulator is
>> > > > > > easily
>> > > > > > > adjustable. TMX devices often have issues with Vcc
>> > > > > > > level and ripple. For example, it may be necessary
>> > > > > > to
>> > > > > > > raise Vcc level somewhat over the spec. This has
>> > > > > > > happened to me several times before with early
>> > > > > > > versions of a DSP
>> > > > > > >
>> > > > > > > -be ultra careful with gnd planes near the device.
>> > > > > > TMX
>> > > > > > > devices often have issues with gnd noise and
>> > > > > > return
>> > > > > > > current. The famous example is early versions of
>> > > > > > TMX
>> > > > > > > C6713 BGA package which had 256 pins. Soon TI
>> > > > > > > introduced a new package -- same chip but with 272
>> > > > > > > pins. What were the extra 16 pins? All Gnd pins
>> > > > > > >
>> > > > > > > -make sure boot mode and other config Rs are big
>> > > > > > ones
>> > > > > > > easy to change, and easy to debug (top side of
>> > > > > > board).
>> > > > > > > It happens often that you want to try different
>> > > > > > configs
>> > > > > > > when one more or another on TMX chip is not
>> > > > > > working as
>> > > > > > > expected
>> > > > > > >
>> > > > > > > -Jeff
>> > > > > > >
>> > > > > > >
>> > > > > > > > --- In c...
>> > > > > > , "jigs_dsp"
>> > > > > > > wrote:
>> > > > > > > >>
>> > > > > > > >> Hi,
>> > > > > > > >>
>> > > > > > > >> TMS320C6455 is based on C64x+ (advanced C64x)
>> > > > > > core. TMS320C6416 is
>> > > > > > > >> based on C64x core. Price for both DSK is same
>> > > > > > and TMS320C6455 DSK
>> > > > > > > > is
>> > > > > > > >> introduced recently. Also C6455 DSK has on
>> > > > > > board 256MB DDR2. Does
>> > > > > > > > it
>> > > > > > > >> mean that I have to select TMS320C6455 DSK? If
>> > > > > > I want to buy it for
>> > > > > > > >> video and imaging applications (mainly for
>> > > > > > codecs development),
>> > > > > > > > then
>> > > > > > > >> which one would be better? and Why? Can you
>> > > > > > please explain in
>> > > > > > > > brief?
>> > > > > > > >>
>> > > > > > > >> Awaiting reply from experts of this forum at
>> > > > > > the earliest.
>> > > > > > > >>
>> > > > > > > >> Thanks and warm regards,
>> > > > > > > >> Jigar.
>> > > > > > >
>> > > > > > >
>> >
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