Re: [Gumstix-users] Sharp LQ050Q5DR01 LCD

[Sumit B. <sb...@ta...>]

Good to know.  I have been doing some reading and this is my 
understanding of the interface so far (view with fixed width font; I'll 
put this on a website eventually) -


GPSstix        Sharp LQ050Q5DR01      My understanding
------------------------------------------------------------------------------------
LCLK            PIN_3  Hsync          signals the end of line
BIAS            PIN_13 CLK?????       signals that new pixel data is 
ready to be read
PCLK            ?????????             pixel clock
FCLK            PIN_28  Vsync         signals the end of a frame
LDD15           PIN_29  R5            RED_4 - Most significant bit     
LDD14           PIN_27  R4            RED_3
LDD13           PIN_25  R3            RED_2
LDD12           PIN_21  R2            RED_1
LDD11           PIN_19  R1            RED_0
LDD10           PIN_8   G5            GREEN_5 - Most significant bit 
LDD9            PIN_6   G4            GREEN_4
LDD8            PIN_4   G3            GREEN_3
LDD7            PIN_37  G2            GREEN_2
LDD6            PIN_35  G1            GREEN_1
LDD5            PIN_33  G0            GREEN_0
LDD4            PIN_24  B5            BLUE_4 - Most significant bit 
LDD3            PIN_22  B4            BLUE_3
LDD2            PIN_20  B3            BLUE_2
LDD1            PIN_16  B2            BLUE_1
LDD0            PIN_14  B1            BLUE_0


Since this LCD is an 18-bit display, I'll simply ground the least 
significant bits for blue and red (RGB565, I assume).  I don't see a pin 
for the BIAS in the datasheet, however.  Where does this go?  PIN_13 is 
described as 'Clock signal for sampling each data signal'.  If this is 
the BIAS, then to what does PCLK connect?

Also, can I use the GPSstix to power the LCD (3.3V)?  I have a picture 
of the lines available on this board at 
http://sumitbirla.com/temp/gpstix.jpg


- Sumit



David Vescovi wrote:
> I used a Sharp LCD very similar to the one you have in my GPS application.
> Should be possible.
>
> http://home.tampabay.rr.com/vescovi/gumstix/gumstix.htm 
>
> DV
>
>
>
>
> -----Original Message-----
> From: gum...@li...
> [mailto:gum...@li...] On Behalf Of Sumit Birla
> Sent: Saturday, May 27, 2006 9:06 PM
> To: gum...@li...
> Subject: [Gumstix-users] Sharp LQ050Q5DR01 LCD
>
> Hello all,
>
> Has anyone interfaced this Sharp 5inch 320x240 LCD successfully with
> Gumstix?  Just trying to gauge how much work will be involved.  I have put
> the datasheet for this LCD at http://sumitbirla.com/temp/ for your
> reference.  It would be helpful if someone could take a look to catch any
> potential show-stoppers.  My knowledge of electronics is limited.
>
> The goal is to build an indash GPS/OBDII/MP3 device (I am probably not the
> only one on this quest).  Previous attempts resulted in a 'not so efficient'
> design.  I am glad that I discovered Gumstix; ordered it last week and got
> the basic stuff working... console, USBNet, GPS, mp3 player, toolchain etc.
>
>
>