LPUART2 of K32L2A microcontroller

paragnarkar — Wed, 08 Apr 2020 14:11:18 GMT

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?

Re: LPUART2 of K32L2A microcontroller

diego_charles — Wed, 08 Apr 2020 21:33:14 GMT

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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LPUART2 of K32L2A microcontroller

Re: LPUART2 of K32L2A microcontroller