Re: [Lcd4linux-devel] display on WRAP-Board - how fast is i2c?

[Luis.F.Correia <Lui...@se...>]

Hi! 

> -----Original Message-----
> From: Stefan Krister [mailto:ste...@cr...] 
> Sent: Tuesday, July 25, 2006 4:12 PM
> To: lcd...@li...
> Subject: Re: [Lcd4linux-devel] display on WRAP-Board - how 
> fast is i2c? ho w good is the lpc connector?
> 
> 
> Hi Luis,
> 
> Luis.F.Correia schrieb am 25.07.2006 15:27:
> > 
> > For the sake of completeness, here's an update to the schematics:
> > 
> > The PCF is powered by +5V, but the I2C inputs are biased to
> > +3.3v, which is the correct voltage level of the WRAP board.
> 
> My datasheet says that voltage between 2.5V and 6.0V are 
> valid. Must I provide 5V also? And where to take ...

How are you powering the LCD?

>From what I've seen, all LCD's I have only +5V power, and yes, I use
an additional power for it.

FYI, i use the power supply from an external 5 1/2 enclosure to 
power my LEAF board. While I could use only the +5V supply to power
all the board, I chose to power the board with the +12V and the +5V
for the LCD and other things i may need.

> > The messages around loading the i2c bus including the scx200_acb.
> 
> There are no messages ..

That is odd...

Can you send me a CF image that you are currently using, so that 
I can test with my WRAP? Private email please. (if you get a 
message too large, let me know, i'll provide another email 
free from restrictions)


Luis Correia   
Bering uClibc Team Member

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