IMX6ULL processor TSC interface related Query?

[ramesh6663]

Hi,

In Imx6ull processor has internal 4/5 wire Resistive Touchscreen Controller so we don't require to use External TSC part through I2C/SPI communication as per my understanding.

Following are the signals used for TSC of LCD module. could you please provide the expansion of ynlr,ypll,xnur, xpul pin names.

I check with the reference design NXP EVK, I have doubt on the xnur, xpul signal connection. Please clarify us

As per my understanding :

xnur - X negative upper right side
xpul - X positive upper left side

ynlr - Y negative lower right side

ypll - Y positive lower left side

Is it correct?

[ramesh6663]

Thanks Igor

[igorpadykov]

Hi ramesh

I think it is correct, unfortunately I am not aware of additional TSC documentation.

May be useful to check lcd datasheet which is used with i.MX6UL EVK board

Detail datasheet of LCD8000-43T 

Best regards
igor
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[ramesh6663]

So I hope it will work directly to LCD which has those 4 signals. Am i right?

Or shall we need to add any buffer circuit inbetwenn SOC and LCD for touch screen signals?

[igorpadykov]

>it will work directly to LCD which has those 4 signals. Am i right?

right

Best regards
igor