How to change the logical output voltage of FRDMKW36?

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Hi there:

I want to drive a external ADC by FRDMKW36, while when I set one GPIO of MKW36 to 1, the output voltage is only about 1.8v and too low to enable the ADC. So can the logical output volatage of GPIO rise to about 3v in FRDMKW36?

May somebody help me?

Thanks.

[Ricardo_Zamora · Accepted solution]

Hello,

Hope you are doing well. Could you please check this Application Note: DC-DC Power Management?

The FRDM-KW36 can be configured to use any of the DCDC converter operating modes. The board is configured in Buck (Auto-Start) by default.

Also, please refer to FRDM-KW36 Freedom Development Board User's Guide. (Section 3.3: Power management).

Hope this helps.

Regards,

Ricardo

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Thank you so much and the problem has been solved.