[VaibhavGhadiok <vaibhavghadiok@gm...>]

I see a chip as you have described. For me it says LTNX E3. It seems to be
from LT.

This is to the left of the connector that is used to connect the gumstix to
the Tweener/Robostix. 

In order for me to power the gumstix I need to connect it to either the
robostix or the tweener board. In both cases he above specified chip gets
covered.

Soldering anything on it seemed a bit dangerous.

Am I talking about the right chip?


Dave Hylands wrote:
> 
> Hi Vaibhav,
> 
> On Thu, Oct 29, 2009 at 12:57 PM, VaibhavGhadiok
> <vaibhavghadiok@...> wrote:
>> I am not sure where to check on the gumstix. I have a basix and I am not
>> able to get the schematics.
>>
>> I got this:
>> http://sketchup.google.com/3dwarehouse/details?mid=64bb986a5deac392e55eaf79ca7dc5e7&prevstart=0
>> But this is not helping.
>>
>> The board is really tiny. I have no clue where to probe.
>>
>> I couldn't figure out the gumstix pins for SDA SCL from the UARTs table
>> given on:
>> http://docwiki.gumstix.org/index.php/Robostix_I/O_pins#In_System_Programming_.28ISP.29
> 
> Just to the left of the white connector is an 8-pin chip. This is the
> 3.3v to 5v converter for the i2c signals.
> <http://www.nxp.com/#/pip/pip=[pip=PCA9515_9]|pp=[t=pip,i=PCA9515_9]>;
> 
> Pins 2 & 3 are the 3.3v SCL and SDA signals from the gumstix. Pins 7 &
> 6 are the corresponding 5v SCL and SDA signals.
> 
>> The pin I was talking about in my previous post is the one on the bottom
>> right in the picture showing the bottom side of the robostix board. I
>> have
>> connected that pin to 5v.
>> http://docwiki.gumstix.org/index.php/Robostix_I/O_pins#In_System_Programming_.28ISP.29
> 
> I think that's the BOARD connector. and that would be the V_ROBOBATT
> signal, which is the input to the voltage regulators. So 5v on that
> pin is fine.
> 
> -- 
> Dave Hylands
> Shuswap, BC, Canada
> http://www.DaveHylands.com/
> 
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