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11 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
11 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.