topic How to set LCD self-refresh mode for IMX25 in i.MX Processors

How to set LCD self-refresh mode for IMX25

dalangtaosha — Tue, 14 Jan 2014 12:42:39 GMT

We use imx25 internal LCD controller and shared LPDDR, which occupy about 45M bandwith.

How to reduce the bandwith occupied by LCDC?

Does LCDC self-reflesh mode benefit it? If so, how to change to self-refresh mode?

I set self-refresh mode in LCDC, but screen becomes white. I wonder whether there is others need modify？

Yuri — Wed, 15 Jan 2014 05:34:51 GMT

The i.MX25 LCDC supports “dumb” display, which screen must be refreshed

by the LCDC, since frame buffer is located in i.MX25 system memory. In this

sense the LCDC does not support display self-refresh. Moreover I have some

doubts if Your display can be configured for such (self-refresh) mode.

In the same time, the i.MX25 SLCDC is intended just for smart, self-refreshed

displays, that have embedded frame buffer. But note, the SLCDC interface differ

from the LCDC one. Special LCD should be applied with the SLCDC.

mallikarjunared — Thu, 06 Feb 2014 09:20:52 GMT

Hi Huang,

I am also trying to interface LCD with imx28. can you please guide me the procedure how you did it?

Thanks & Regards

dalangtaosha — Fri, 07 Feb 2014 02:53:01 GMT

Hi Mallikarjuna,

Sorry. I don't know how to use self-refresh mode also.

Best Regards

在 2014-02-06 17:21:56，"Mallikarjuna Reddy" <admin@community.freescale.com> 写道：

How to set LCD self-refresh mode for IMX25

reply from Mallikarjuna Reddy in i.MX Community - View the full discussion

Hi Huang,

I am also trying to interface LCD with imx28. can you guide me the procedure how you did it?

Thanks & Regards

Reply to this message by replying to this email, or go to the message on Freescale Community

Start a new discussion in i.MX Community by email or at Freescale Community

Following How to set LCD self-refresh mode for IMX25 in these streams: Inbox