[coreboot] useful hardware - dip8 to soic8 adapter
wt at penguintechs.org
Sat Jun 20 06:35:31 CEST 2009
Honestly, I was thinking of getting the adapter I linked to and
getting the reverse adapter and soldering the exact serial flash chip
that is currently on my motherboard onto the reverse adapter. Then I
could have a few of those. Because that have the exact same chip, I'd
hope that I could just plug it in and expect it to work.
On Fri, Jun 19, 2009 at 5:37 PM, Urja Rannikko<urjaman at gmail.com> wrote:
> On Sat, Jun 20, 2009 at 02:32, Peter Stuge<peter at stuge.se> wrote:
>> Note that only MMC (the very old cards) use 1-bit SPI. Any newer card
>> uses a wider interface, which means even more complex translation
> Although it doesnt matter, every SD card must support 1-bit SPI (by spec).
>> And even if the translation state machine would be fast enough, if
>> e.g. it runs off it's own clock at maybe 100MHz instead of whatever
>> is on SPI, the consumer grade flash memory cards can themselves have
>> longer response times than what is allowed by the mainboard SPI.
>> MMC has unlimited response times, as an example. Ie. the card can
>> take as long as it wants to respond, at least for writes.
>> The cards can also have rather complex voltage requirements.
> Complex = 3.3V? (depends on the card though)
>> All in all, a ton of work, and even doubtful that it could succeed.
> I tought of this for a while (after i sent that message) and, we'll i
> doubt its not even possible directly, it would need an ASIC with some
> serious caching to work, if possible.
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