How to change Dedicated pins?

[Shivanand]

Hi NXP team,

I'm using a custom board with an S32K358 microcontroller. In my board, one pin is optionally dedicated for VRC. Now I want to use that pin as GPIO or FlexIO. Is it possible? Please assist me.

[VaneB]

Hi @Shivanand 

Last Mile regulator base control (VRC_CTRL) is disabled by default. To enable it, set PCM_CONFIG[LMBCTLEN] and PCM_CONFIG[LMEN]. Configuring it is similar to other pins, but dedicated configurations should be considered if you want to use it as VRC_CTRL. You can also refer to the following threads where this topic has been discussed.

S32K3：PTE13 ADC1_S19 acquisition abnormal jumps

S32K344-How to configure to use the VRC_CTRL function

BR, VaneB

[Shivanand]

Hi @VaneB,

As you told me, me, until and unless I enable vrc_ctl, it is disabled. Even if I try to make it gpio or emios, the pin is always high at 3.3 V.

[VaneB]

Hi @Shivanand 

Could you please verify the values of the PCM_CONFIG[LMBCTLEN] and PCM_CONFIG[LMEN] registers?

[Shivanand]

Hi @VaneB 
The values of PMC registers, if any issue how can i resolve it.

[VaneB]

Hi @Shivanand 

Thank you for sharing the information. Since PCM_CONFIG[LMBCTLEN] and PCM_CONFIG[LMEN] are set to 1, this means that the External BCTL regulator for V15 and the Last Mile regulator are both enabled. Please disable these settings as mentioned in previous shared threads.

[Shivanand]

Hi @VaneB .

The settings which are in the old thread are disabled . But in the register it  is set to 1.

[VaneB]

Hi @Shivanand 

To help us better understand your setup, could you please let us know which software version you are using?

Also, as part of the troubleshooting process, could you try manually setting the PCM_CONFIG[LMBCTLEN] and PCM_CONFIG[LMEN] register fields to 0 and let us know the result?