OLPC hardware: what if there was an SDR modem / chipset?
tiagomnm at gmail.com
Tue Mar 9 14:42:34 EST 2010
I see. Thanks for clearing that up.
So you can only fit those Marvell WLAN modules there or if needed, can you
switch to another one down the line?
Do you have an idea of per unit manufacturing costs for the XO 1.5?
On Tue, Mar 9, 2010 at 5:58 PM, John Watlington <wad at laptop.org> wrote:
> On Mar 9, 2010, at 11:22 AM, Tiago Marques wrote:
> Thanks. The connector for the WLAN card did seem a mini-PCIe but I thought
>> you were going to stick with SDIO.
> We did. Don't confuse a connector with the bus used
> with it. Many WLAN cards these days use a miniPCIe
> connector/form factor but use USB as the interconnect.
> We provide both USB and SDIO to the connector, but
> only use SDIO.
> On Mon, Mar 8, 2010 at 10:10 PM, John Watlington <wad at laptop.org> wrote:
>> On Mar 7, 2010, at 10:24 PM, Tiago Marques wrote:
>> Hi Wad,
>> Been reading some "lost" e-mails, sorry to be bumping this up.
>> On Tue, Jan 26, 2010 at 10:35 PM, John Watlington <wad at laptop.org> wrote:
>> On Jan 27, 2010, at 12:17 AM, Luke Kenneth Casson Leighton wrote:
>> > hi scott, thanks for joining in, here.
>> > On Tue, Jan 26, 2010 at 3:01 PM, C. Scott Ananian
>> > <cscott at laptop.org> wrote:
>> >> Good luck with your SDR dreams. I think the most you can expect from
>> >> OLPC is that, *if* the 10 improbable things you described actually
>> >> come to pass, OLPC will someday include a miniPCI slot so that they
>> >> can plug in your magic daughtercard.
>> > miniPCI assumes there's a PCI bus. ARM SoCs don't have PCI (that i
>> > know of). the only SoC x86 chip i've heard about is the 1ghz IEC
>> > 100HV from RDC. but with ARM it'd have to be a mini PCI-e slot with
>> > the USB2 option - pins 36 and 34 - but that's been ruled out because
>> > john's removed all internal USB paths. the next gen x86 clone from
>> > RDC that they're planning will have full PCI-e.
>> Actually, I got that miniPCI connector into XO-1.5. I won't go into
>> You did? I can't find any reference in the XO 1.5 diagrams.
>> Is it already being used for something?
>> Read the next paragraph I wrote:
>> But as with most networking cards, the miniPCI is just a form factor.
>> Most WiFi/GSM cards on the market electrically use a USB connection.
>> On XO-1.5, we use SDIO, but also provide a spare USB port to the miniPCI
>> (why not ?) The form factor is half-length miniPCI, and the pinout
>> is documented at: http://wiki.laptop.org/images/0/05/
>> CN19 in that document is the PCIe pinout.
>> shows the miniPCIe connector, with a WLAN card attached.
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