MCF54452 I/O 5V 电平兼容问题

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MCF54452 I/O 5V 电平兼容问题

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johnsonzhang1
Contributor II

MCF54452 3.3V 供电,请问其I/O 引脚兼容5V 电平吗?

3 Replies

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Hui_Ma
NXP TechSupport
NXP TechSupport

Hi,

MCF54452 I/O is not 5V tolerance, which can using 3.3V to 5V level shifting transceiver chip.

Wish it helps.

best regards,

Mike

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TomE
Specialist I

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.

Tom

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johnsonzhang1
Contributor II

Can the MCF54452 I/O compatible with the 5V level? how to do it ?

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