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From: satish.aradhya on 14 Apr 2010 01:40
HI,
I have the following queries based on the Flash Memory,

000. What is the advantage of Top Boot Flash Memory and
What is the advantage of Bottom Boot Flash memory ?

001. what are the other differences between these Boot Block based
Flash memories
and Normal Flash Memories ?


Satish
From: Tauno Voipio on 14 Apr 2010 01:57
On 14.4.10 8:40 , satish.aradhya wrote:
> HI,
> I have the following queries based on the Flash Memory,
>
> 000. What is the advantage of Top Boot Flash Memory and
> What is the advantage of Bottom Boot Flash memory ?
>
> 001. what are the other differences between these Boot Block based
> Flash memories
> and Normal Flash Memories ?
>
>
> Satish

This has a strong smell of a study assignment, but ...

001. Boot block is an erase block which is split into
smaller pieces than an usual erase block on the chip.

000. A bottom boot chip has split the lowest-address
erase block into smaller pieces, a top-boot chip
has the split block at the highest addresses of the chip.

--

Tauno Voipio, MSEE
tauno voipio (at) iki fi

From: whygee on 14 Apr 2010 01:21
satish.aradhya wrote:
> HI,
> I have the following queries based on the Flash Memory,
>
> 000. What is the advantage of Top Boot Flash Memory and
> What is the advantage of Bottom Boot Flash memory ?
the Top Boot is faster.
The bits fall from higher.

> 001. what are the other differences between these Boot Block based
> Flash memories
> and Normal Flash Memories ?
just read the datasheets.

> Satish
yg

--
http://ygdes.com / http://yasep.org
From: Jim Stewart on 14 Apr 2010 13:53
satish.aradhya wrote:
> HI,
> I have the following queries based on the Flash Memory,
>
> 000. What is the advantage of Top Boot Flash Memory and
> What is the advantage of Bottom Boot Flash memory ?
>
> 001. what are the other differences between these Boot Block based
> Flash memories
> and Normal Flash Memories ?

Professor says do your own homework.

Hint, where does a 68000 start executing code on
startup? An x86 processor?
From: d_s_klein on 14 Apr 2010 14:32
On Apr 13, 10:21 pm, whygee <y...(a)yg.yg> wrote:
> satish.aradhya wrote:
> > HI,
> >    I have the following queries based on the Flash Memory,
>
> > 000. What is the advantage of Top Boot Flash Memory and
> >         What is the advantage of Bottom Boot Flash memory ?
>
> the Top Boot is faster.
> The bits fall from higher.
>

Wrong, wrong, wrong. (Not true.) The bits from the top-boot have to
filter down through all of the non-boot blocks, which takes -longer-.

Especially if the non-boot blocks are programmed - 1 bits have a lower
co-efficient of friction than 0 bits do.

The real problem with bottom-boot is that if you do a lot of
debugging, all the dead bugs tend to collect there and clutter things
up.

RK.
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