topic Re: Using a generic TFT display with Sabre Lite in i.MX Processors

Using a generic TFT display with Sabre Lite

davidbrooks — Mon, 27 May 2013 10:03:30 GMT

Hi all,

I am trying to understand how the parallel LCD display interface is used, from the Sabre Lite schematic.

That board was presumably designed with a particular (class of) display in mind: can someone tell me what it is? Then I'll get it's documentaion, & understand more.

Particularly, I need to understand better what these signals are used for:

PWM1 (pin 37) - what does this do?

DRDY (pin 34) - is this Data Enable?

CNTRST (pin 4) - this sounds like "contrast": is it a PWM signal?

Regards & thanks,

Re: Using a generic TFT display with Sabre Lite

weidong_sun — Tue, 28 May 2013 05:42:28 GMT

Hello,David,

I don't konw which schematic you are reading, but normally:

>>PWM1 (pin 37) - what does this do?

this is PWM signal. there are more 2 PWM modules in i.MX SoC.

>>DRDY (pin 34) - is this Data Enable?

This is data enable signal.

>>CNTRST (pin 4) - this sounds like "contrast": is it a PWM signal?

Yes, it is PWM signal. used to control back light of LCD.

Regards,

Weidong

Re: Using a generic TFT display with Sabre Lite

davidbrooks — Wed, 29 May 2013 20:45:01 GMT

Many thanks, Weidong.

I was using the Sabre Lite schematic published by Element 14 (aka Farnell Australia), Sheet 15.

Presumably the Sabre was designed with a particular display in mind (connector pinout, etc.) - do you know which that is?

Regards

Re: Using a generic TFT display with Sabre Lite

weidong_sun — Thu, 30 May 2013 01:28:03 GMT

Hello,David,

Please understand them like above what I described . and would you like to share schematic with me ?

my email : weidong.sun@freescale.com.

Thanks,

Weidong