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UART port configuration

Question asked by Sanket Parekh on Apr 17, 2018
Latest reply on Apr 17, 2018 by igorpadykov

Hi

 

Greetings,

 

I am using IMX6Q processor on my custom board.

I am trying to configure one of the UART port in LINUX kernel.

After configuration i am getting 2.8V on TX pin instead of 3.3V and 3.3V on RX pin.

I am using 3.3V on NVCC_EIM power domain for UART.

 

Firmware configuration:

       UART_TX: SRE_FAST, DSE_DISABLE, SPEED_MED, CTL_HYS.

       UART_RX: SRE_FAST, DSE_DISABLE, SPEED_MED, CTL_HYS, CTL_PUS_100K_UP, CTL_PKE, CTL_PUE.

Above configuration are used by kernel as a pad value of device tree node.

 

What could be the cause for this issue?

 

Thank you.

Sanket

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