I have looked through the user manuals for the K64F AND KL25Z development boards, but don't see an answer to this. Are I/O pins of the boards 5 V tolerant, what voltage is a logic high, is it related to supply voltage ?
Thanks,
Mark
Solved! Go to Solution.
Hello Mark:
The 5V tolerance question is not dependent on the board, but in the MCU device itself. You have to refer to the corresponding datasheets:
KL25: KL2x |Kinetis KL2x USB MCUs|Freescale -> Documentation -> KL25P80M48SF0
K64: K64_120 |Kinetis K64 120 MHz MCUs|Freescale -> Documentation -> K64P144M120SF5
- KL25 does not have 5V tolerant I/O pins:
- In K64 all the Digital pins (PTA, PTB, etc...) are 5V tolerant except for RESET, EXTAL and XTAL:
As you can see, both are 3.3 V devices (max 3.8 V). The min/max logical levels can be also found in the datasheet.
Regards!,
Jorge Gonzalez
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Hello Mark:
The 5V tolerance question is not dependent on the board, but in the MCU device itself. You have to refer to the corresponding datasheets:
KL25: KL2x |Kinetis KL2x USB MCUs|Freescale -> Documentation -> KL25P80M48SF0
K64: K64_120 |Kinetis K64 120 MHz MCUs|Freescale -> Documentation -> K64P144M120SF5
- KL25 does not have 5V tolerant I/O pins:
- In K64 all the Digital pins (PTA, PTB, etc...) are 5V tolerant except for RESET, EXTAL and XTAL:
As you can see, both are 3.3 V devices (max 3.8 V). The min/max logical levels can be also found in the datasheet.
Regards!,
Jorge Gonzalez
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------