LCD Screen iMX RT1170 EV Board

[TM_MI]

Hello,

Does the schematic for the evaluation board RT1170 includes only the connection for the LCD screen without the touch panel?

Looking at data sheet for the default LCD used shows 6 pins FCP connector for the CTP.

Thanks,

Tarek

[b36401]

Here is a datasheet for RK055HDMIPI4M :

https://www.nxp.com/docs/en/supporting-information/RK055AHD091-CTG.pdf

[TM_MI]

Hi @b36401 

I have checked the Data sheet and the LCD does include a touch panel; however the schematic here does not include the connection for the touch panel but only the 40 pins for the LCD display.

My first assumption was that I2C5_SDA, I2C5_SCLand CTP_INT are the connection for the touch panel, but I think they are used for “Extended Display Identification Data”

Please correct me if I am wrong.

Thanks,

Tarek

[jeremyzhou]

Hi @TM_MI ，
Your instinct is right, the CTP_SDA and CTP_SCL are used to fetch the touch position of LCD.
BR,
Jeremy

[TM_MI]

Hello @jeremyzhou 

Thank you.

To clarify things, The CTP pins 1-6 shown on the datasheet are used for the touch panel and the FPC pins 26-29 are also used for the touch panel, but the CTP 1-6 pins are connected internally to 26-29.

So, another connection other than the FPC 40 (Pins 26-29) is not needed to connect to the touch panel.

Regards,

Tarek