MCF54452 3.3V 供电，请问其I/O 引脚兼容5V 电平吗？
Can the MCF54452 I/O compatible with the 5V level? how to do it ?
MCF54452 I/O is not 5V tolerance, which can using 3.3V to 5V level shifting transceiver chip.
Wish it helps.
There are lots of solutions that don't involve using a level shifting chip. For digital or analog inputs you can use resistive dividers. For outputs driving LEDs you can have the I/O pin drive an external FET or transistor. If you're driving something like an SPI, I2C or parallel bus it gets complicated.
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