Peter -

That is indeed correct, but it was also to reduce cost.  The demand for NAND in 
microSD card format is driven by cameras and cell phones.  Since those volumes 
are very high compared to the sales volume of raw NAND chips, a microSD card of 
a desired capacity was actually cheaper than raw NAND chips.

        - Ed

Ed McNierney
CTO
One Laptop per Child
e...@laptop.org
+1 (978) 761-0049

On Aug 16, 2011, at 12:33 PM, Peter Robinson wrote:

> On Tue, Aug 16, 2011 at 5:21 PM, Alan Jhonn Aguiar Schwyn
> <alan...@hotmail.com> wrote:
>> 
>> I always wondered why not put an SD of 2 instead of 1, suppose that
>> production costs differ in nothing (or very little)....
> 
> The XO-1 doesn't have an SD card, its a flash chip soldered to the
> motherboard. The 1.5 introduced the internal sd card to allow
> deployments to chose size and speed.
> 
> Peter
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