Zafar-
> yes ,of course you are right . but i ahve designe
the 16 hardware already.
Ok, didn't know that. For 8-bit Flashburn, I'm not sure what to
suggest. I think
there is a third-party that's taken over support for Flashburn:
http://www.softwaredesignsolutions.com/flashburn.aspx
You might ask them.
> Now i want to design the board on 8 bit ROM. there
is also the voltage
> translator to make the 5v compatible with 3.3 volt .i think this will
> be the different and challenging design.
Level translation is not difficult, TI has a wide range of chips for that. But
I
don't think you're going to save cost. Maybe you can get away with
running address
lines and control signals direct, but you will need at least 8+ bit level
translator
for PROM output or bi-directional lines. Will cost of that chip be less then
difference between 16-bit and 8-bit Flash? I have my doubts.
-Jeff
> On Mon, May 24, 2010 at 4:49 PM, Jeff Brower
wrote:
>
> Zafar-
>
> > I want to make the board which can access the 8 bit flash for
> example
> > At29c010 or any 8 bit PROM.yes it is difficult and slow but lot of
> memory
> > easily available are 8 bit .
> Well that's a good reason. But still I'm doubtful. First the
AT29C010
> is a 5V part, so you can't use that (or at
> least you would add cost by using level translators). Second, what is
> the price differential for 16- bit? Is it
> really that much?
>
> Maybe the approach is to get your first prototype working with 16-bit
> Flash to avoid a debug / tech support struggle,
> then move to 8-bit. You can design the board to accept both devices,
> maybe even "overlap" the footprints of the two
> chips to save space.
>
> -Jeff
>
> > On Mon, May 24, 2010 at 12:09 AM, Jeff Brower
> wrote:
> >
> >> Zafar-
> >>
> >> > what are the differences between the 8 bit and 16 bit boor
> >> > loader.Flash burn utility have the example of 16 bits, how
> >> > it can be make the 8 Bits ?
> >>
> >> Specific questions: which chip are you using, what board, what
Flash
> >> device?
> >>
> >> General question: why would you want to use 8-bit Flash access?
It
> would
> >> be slower, would not match the TI reference
> >> designs (thus more difficult to debug), and when you need tech
> support, no
> >> one else is using it.
> >>
> >> -Jeff
> >>
> >>
>
Re: bootloader problem
Started by ●May 25, 2010
Reply by ●May 26, 20102010-05-26
May be cost goes equal but we are in circle of single design of 16bit , we
must know the 8bit booting design.It will give the more confidence .
2010/5/25 Jeff Brower
> Zafar-
> yes ,of course you are right . but i ahve designe the 16 hardware already.
>
> Ok, didn't know that. For 8-bit Flashburn, I'm not sure what to suggest.
> I think there is a third-party that's taken over support for Flashburn:
>
> http://www.softwaredesignsolutions.com/flashburn.aspx
>
> You might ask them.
> Now i want to design the board on 8 bit ROM. there is also the voltage
> translator to make the 5v compatible with 3.3 volt .i think this will
> be the different and challenging design.
> Level translation is not difficult, TI has a wide range of chips for that.
> But I don't think you're going to save cost. Maybe you can get away with
> running address lines and control signals direct, but you will need at least
> 8+ bit level translator for PROM output or bi-directional lines. Will cost
> of that chip be less then difference between 16-bit and 8-bit Flash? I have
> my doubts.
>
> -Jeff
>
> On Mon, May 24, 2010 at 4:49 PM, Jeff Brower wrote:
>>
>> Zafar-
>>
>> > I want to make the board which can access the 8 bit flash for example
>>
>> > At29c010 or any 8 bit PROM.yes it is difficult and slow but lot of
>> memory
>> > easily available are 8 bit .
>> Well that's a good reason. But still I'm doubtful. First the AT29C010 is
>> a 5V part, so you can't use that (or at
>> least you would add cost by using level translators). Second, what is the
>> price differential for 16- bit? Is it
>> really that much?
>>
>> Maybe the approach is to get your first prototype working with 16-bit
>> Flash to avoid a debug / tech support struggle,
>> then move to 8-bit. You can design the board to accept both devices,
>> maybe even "overlap" the footprints of the two
>> chips to save space.
>>
>> -Jeff
>>
>> > On Mon, May 24, 2010 at 12:09 AM, Jeff Brower wrote:
>>
>> >
>> >> Zafar-
>> >>
>> >> > what are the differences between the 8 bit and 16 bit boor
>> >> > loader.Flash burn utility have the example of 16 bits, how
>> >> > it can be make the 8 Bits ?
>> >>
>> >> Specific questions: which chip are you using, what board, what Flash
>> >> device?
>> >>
>> >> General question: why would you want to use 8-bit Flash access? It
>> would
>> >> be slower, would not match the TI reference
>> >> designs (thus more difficult to debug), and when you need tech support,
>> no
>> >> one else is using it.
>> >>
>> >> -Jeff
>> >>
>> >>
>> >
>
must know the 8bit booting design.It will give the more confidence .
2010/5/25 Jeff Brower
> Zafar-
> yes ,of course you are right . but i ahve designe the 16 hardware already.
>
> Ok, didn't know that. For 8-bit Flashburn, I'm not sure what to suggest.
> I think there is a third-party that's taken over support for Flashburn:
>
> http://www.softwaredesignsolutions.com/flashburn.aspx
>
> You might ask them.
> Now i want to design the board on 8 bit ROM. there is also the voltage
> translator to make the 5v compatible with 3.3 volt .i think this will
> be the different and challenging design.
> Level translation is not difficult, TI has a wide range of chips for that.
> But I don't think you're going to save cost. Maybe you can get away with
> running address lines and control signals direct, but you will need at least
> 8+ bit level translator for PROM output or bi-directional lines. Will cost
> of that chip be less then difference between 16-bit and 8-bit Flash? I have
> my doubts.
>
> -Jeff
>
> On Mon, May 24, 2010 at 4:49 PM, Jeff Brower wrote:
>>
>> Zafar-
>>
>> > I want to make the board which can access the 8 bit flash for example
>>
>> > At29c010 or any 8 bit PROM.yes it is difficult and slow but lot of
>> memory
>> > easily available are 8 bit .
>> Well that's a good reason. But still I'm doubtful. First the AT29C010 is
>> a 5V part, so you can't use that (or at
>> least you would add cost by using level translators). Second, what is the
>> price differential for 16- bit? Is it
>> really that much?
>>
>> Maybe the approach is to get your first prototype working with 16-bit
>> Flash to avoid a debug / tech support struggle,
>> then move to 8-bit. You can design the board to accept both devices,
>> maybe even "overlap" the footprints of the two
>> chips to save space.
>>
>> -Jeff
>>
>> > On Mon, May 24, 2010 at 12:09 AM, Jeff Brower wrote:
>>
>> >
>> >> Zafar-
>> >>
>> >> > what are the differences between the 8 bit and 16 bit boor
>> >> > loader.Flash burn utility have the example of 16 bits, how
>> >> > it can be make the 8 Bits ?
>> >>
>> >> Specific questions: which chip are you using, what board, what Flash
>> >> device?
>> >>
>> >> General question: why would you want to use 8-bit Flash access? It
>> would
>> >> be slower, would not match the TI reference
>> >> designs (thus more difficult to debug), and when you need tech support,
>> no
>> >> one else is using it.
>> >>
>> >> -Jeff
>> >>
>> >>
>> >
>
