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9 years, 10 months ago.
UART logic level converter needed for KL-25Z?
Hello, I plan to use UART1 (PTD2/3). Also, I will be using a external device that has logic level of 5V. I hope that should be fine and I won't need a logic level converter. Right? TIA, -Gitesh
1 Answer
9 years, 10 months ago.
The KL25Z is imo very nice, but sadly no 5V tolerant inputs. So it won't enjoy 5V at its input. But unless you are using a high speed UART connection you can simply make either a resistive voltage divider. Even a few kilo-Ohm resistor in series with your wire should work, the ESD diode should do the rest.