external crystal fuse settings but external clock ?

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It would work or harm the micro (mega168) if I set the fuse for external crystal but instead to have a crystal in place to provide an external clock to the XTAL1 pin ?
George.

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No problem. Do it on a regular basis. Feed the clock into Xtal1-pin and leave Xtal2-pin unconnected.

Cheers

Nard

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Everyone who ever set (or kept) "crystal fuses" for an MCU plugged into an STK500 and used its clock circuit has effectively done this ;-) You say "crystal" but what it effectively gets is "external clock".

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Waw, good news from two moderators. Thank you.
George.

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You would not want to use XTAL2 as a general purpose I/O when it is set up like that. That is about the only limitation I can see.

Jim

Jim Wagner Oregon Research Electronics, Consulting Div. Tangent, OR, USA http://www.orelectronics.net