topic Re: How to use LVDS output in i.MX Processors

How to use LVDS output

ko-hey — Mon, 27 Jul 2015 04:15:37 GMT

Hi all

I have question about using LVDS output.

1.When I use LVDS output, do I need any register settings of IPU ?

If yes, please let me know the register.

2.I'm watching both a figure37-39 and figure39-1.

In my understanding, DI's output is connected to LDB input such as lcdif1_data, lcdif1_hsync, lcdif1_vsync, lcdif1_enable, lcdif1_reset and lcdif1_clk.

If my understanding is correct, please tell me knoe the connection of each port.

3.Does LVDS_TXx and LVDS_CLK are made from Parallel Interface Data Synchronizer'DATA and Timing Generator'DISP_CLK ?

4.Let me confirm about IPUx_DI0_GENERAL register's discription.

The discription includes following signal that like external pins.

Are these pins internal signal?

IPU_DI0_GENERAL　bit22 IPP_PIN_2

IPU_DI0_GENERAL　bit21 External VSYNC

IPU_DI0_GENERAL　bit20 External CLOCK

IPU_DI0_GENERAL　bit17 Output Clock

IPU_DI0_GENERAL　bit7:0 di0_polarity_i_1

ko-hey

Re: How to use LVDS output

igorpadykov — Mon, 27 Jul 2015 07:33:56 GMT

HI ko-hey

1. yes. For register settings of IPU one can look at SDK ldb example

2. yes understanding is correct and DI's output is connected to LDB input.

Connections can be found in Figure 39-1. LDB Block Diagram

http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6DQRM.pdf

also it may be useful to look at Figure 19-1. i.MX53 LVDS Display Bridge (LDB) Block

http://www.freescale.com/files/32bit/doc/user_guide/MX53UG.pdf

3. LVDS_TXx and LVDS_CLK are produced by LDB block internally, LDB uses

DI's output for its producing

4. all clocks described in IPUx_DI0_GENERAL are produced by IPU internally

for usage with LDB. For code examples one can look at SDK ldb example

i.MX6Q|i.MX 6Quad Processors|Quad Core|Freescale

Best regards

igor

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Re: How to use LVDS output

ko-hey — Tue, 28 Jul 2015 02:46:44 GMT

Hi Igor

Thanks!!

ko-hey