Kinetics KE02 uart0 pin configuration

[rob]

I'm trying to change UART0_Tx configuration from PTB1 to PTA3 external pin, setting the SIM_PINSEL register:

SIM->PINSEL |= (SIM_PINSEL_UART0PS_MASK | SIM_PINSEL_IICPS_MASK) ;

I correctly read the external output UART0 signal on PTB1 pin but I'm not able to read the same output on PTA3. Do you know if it's necessary to set some other registers to obtain the output data on the other pin? Thank you.

[Jorge_Gonzalez]

Hello Roberto Casella:

As explained in your Service Request, PTA3 is a "True Open Drain" pin, so you need an external pull-up resistor. Similar questions have been answered here in community:

Re: Cannot toggle over PTA3 in FRDM-KE02Z

Re: UART0 not working with KE06

Regards!,
Jorge Gonzalez

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