Internal RC Oscillator for industrial environment

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We are using Atmega8 or atmega88 for our project
Is it Internal RC Oscillator will work fine for industrial environment/electrical noisy environment.
Any precaution to be taken for using internal oscillator

Thank you,

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IMHO, the Internal RC Oscillator is ideal for this sort of app. You need no precautions. Just your regular decoupling capacitors and board layout.

However the timing will not be as accurate or stable as a crystal.

It is wise to check the calibration for the USART, but the USART only needs to be within 2% accuracy.

David.

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thank you David.
We are not using USART or any timing critical I/O Functions

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You might want to read up on documents and application notes like this one from ATMEL:

AVR040: EMC Design Considerations
http://www.atmel.com/dyn/resourc...

There is also additional information on the AVR reset pin here:

AVR042: AVR Hardware Design Considerations
http://www.atmel.com/dyn/resourc...

You might find other useful information on the ATMEL application notes page:
http://www.atmel.com/dyn/product...

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Thank You Mike