Re: [Gumstix-users] SPI voltage Levels with OVero

[Bernhard Wörndl-A. <bw...@xd...>]

Hey again.

The IC is unidirectional, you just need an uni-directional one
CS, CLK and DO(MOSI) has to go from Overo to Device
DI(MISO) has to go from Device to Overo

that means you need 3 lines from A to B and 1 line from B to A.
If the IC is to big for you you might just use some of it's little brothers

for example for of those:
http://focus.ti.com/docs/prod/folders/print/sn74lvc1t45.html

or three of those:
http://focus.ti.com/docs/prod/folders/print/sn74lvc2t45.html

In my case, the MAX1840 lack of one line for the use with a "standard" 
SPI bus,
and as i haven't tested the IC i can't say anything about the IC.


Regards

*Bernhard Wörndl-Aichriedler*

Am 05.05.2010 12:44, schrieb J.Castane:
>
> Hi Bernhard,
>
> Thanks so much for kindly help.
>
> I have read the 74AC164245 datasheet. That chip is bidirectional and  I
> think it's a bit large for that case, I want to use a SPI protocol, only 3
> lines.
>
> Do you think that I could use the MAX1840/41 ?
>
> Best regards
>
> Jesús
>
>
>
>