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avoiding damaging controller during UART communication

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yefj

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Hello, i am trying to communicate with my board which uses efm32lg230f256 controller.
I want to buy a cable for RS232 UART communication which properties shown in the table and link bellow.
In the table bellow from the data sheet i cant see to what voltage the controller can accept?
There could be situation where my PC will send a command with a higher values then the controller can handle and damage it.
How can i make sure it wont happen?
Thanks.


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FvM

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Of course the cable datasheet can't tell about the controller input voltage. The cable has 3.3V logic not RS232 level. It should work with any 3.3V controller. You find details about the controller IO voltages in the DC characteristics datasheet section.
 

    yefj

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yefj

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Yes on page 63 ,on the section you said to look in i saw VDD=3V and IOVoltage 3.3V .

So i assume that this cable is safe to work with my controller.
Thanks.
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