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 24, 2010
Reply by ●May 25, 20102010-05-25
yes ,of course you are right . but i ahve designe the 16 hardware already.
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.
yes this is the good idea board accept both the devices.
zafar
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
> >>
> >>
> >
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.
yes this is the good idea board accept both the devices.
zafar
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
> >>
> >>
> >
Reply by ●May 25, 20102010-05-25
zafar,
On Mon, May 24, 2010 at 11:07 PM, Zafar Iqbal wrote:
> yes ,of course you are right . but i ahve designe the 16 hardware already.
> 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.
>
I think that 'technical curiosity' [I assume that is your motivation] and
experimentation can provide some very good experience. BTW, if your goal is
to experiment with an 8 bit device, your 16 bit board *might* be a small
tweak away from using one of the x8/x16 devices.
mikedunn
>
> yes this is the good idea board accept both the devices.
>
> zafar
> 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
>> >>
>> >>
>> >
>
>
--
www.dsprelated.com/blogs-1/nf/Mike_Dunn.php
On Mon, May 24, 2010 at 11:07 PM, Zafar Iqbal wrote:
> yes ,of course you are right . but i ahve designe the 16 hardware already.
> 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.
>
I think that 'technical curiosity' [I assume that is your motivation] and
experimentation can provide some very good experience. BTW, if your goal is
to experiment with an 8 bit device, your 16 bit board *might* be a small
tweak away from using one of the x8/x16 devices.
mikedunn
>
> yes this is the good idea board accept both the devices.
>
> zafar
> 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
>> >>
>> >>
>> >
>
>
--
www.dsprelated.com/blogs-1/nf/Mike_Dunn.php
