How to configure RT1064 gpio to output Hi-Z

[foreverwlh2025]

In the project, the following pins are used as SPI. After SPI communication is completed, they need to be configured as high impedance output. However, there is no relevant description in the register. How should we configure these pins to output Hi-Z?
ps:000 DSE_0_output_driver_disabled == Hi-Z ??

[Gavin_Jia]

Hi @foreverwlh2025 ,

Thanks for your interest in NXP MIMXRT series!

Is configuring LPSPI2_PCS2 as High-Z a requirement from your slave device? Could you please clarify the use case so I can confirm internally? Thank you in advance!

Best regards,
Gavin

[foreverwlh2025]

HI, @Gavin_Jia 

As shown in the figure below, RT1064 spi2 is used to import data into SPI flash, and DSP loads firmware from SPI flash, which means that MCU and DSP SPI are connected together;
To avoid the influence of MCU side during DSP startup, we want to set the SPI2 wires as Hi-Z

PS: Our project is about to begin, and we hope you can help us confirm as soon as possible. Thank you!!

[foreverwlh2025]

Hi @Gavin_Jia 

Can you help confirm it today? Maybe it's not particularly difficult.  i.MX-RT1064 

Look forward to your reply！！

[Gavin_Jia]

Hi @foreverwlh2025 ,

I received feedback from internal experts:

To make RT1xxx series into High-Z status.
1.Set mux to ALT5 as GPIO function
2,Disable the pull up and pull down
3.Set GPIO as input mode.

Best regards,
Gavin

[foreverwlh2025]

Hi @Gavin_Jia 

Thank you for your reply！
2, Disable the pull up and pull down
-------To make this effective, just PKE=0 is enough, or PKE=0, PUE=1?

[Gavin_Jia]

Hi @foreverwlh2025 ,

Just PKE=0 is enough.

Best regards,
Gavin