LPUART2 of K32L2A microcontroller

[paragnarkar]

I was referring datasheet of K32L2Ax Datasheet. I found that for LQFP 64 model on pin number 11 and 12  i.e PTE22 and PTE23 has alternate functionality of LPUART2_TX and LPUART2_RX functionality.

Similarly i found that on pin number 59,60,61,62 i.e PTD2,PTD3,PTD4,PTD5 has alternate functionality of LPUART2_RX,LPUART2_TX,LPUART2_RX,LPUART2_TX

So if i want to use LPUART2 channel can i use Pin 11 for TX and Pin 61 for RX to communicate with a single device.

How does this multiplexing works?

[diego_charles]

Hello, 

You can use pins  Pin 11 for TX and Pin 61 for RX.

But I recommend to pick, If possible,  the LPUART pins that are routed  together.

The pins have a default muxing alternative. You will need to set the new alternative (ALT )Into the Pin control register (PCR). 

To do this with ease:

•  You can use the Config Tools-> Pins to generate code that configure  the pins alternative. Here is a  guide 

  for the tool Chapter 23 Pins tool

Also, as a reference,   you can check the function BOARD_InitPins()  , located in the  main() of the SDK example lpuart_polling, there you will find, the pin initialization for the pins used by LPUART0. 

Please note that  the function PORT_SetPinMux() is used for set the pin mux alternatives.

Please let me know if this was useful. 

Have a great day,
Diego

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