using external crystal

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i want to use a external crystal for my next project can anyone tell me how do i connect the crystal most probably to an atmega16 or32(circuit description) and also if any kind of programming needs to be done to initialize the crystal

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How about reading the datasheet ?

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Read the datasheet Unit "System Clock and clock options"
There are some fuse bits you have to set when you program the device.

Read carefully.

Michael

Michael.

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plzz can u explain me how to use fuse bits and how to change them i have got no idea abt them

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which is the programmer that you use for programming AVRs?

Michael.

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iam using bsd parallel port programmer to program the device nad i dont have any idea how to change the fuse bits neither to disable jtag nor to use external oscillator

plzz help the data sheet seems kinda confusing

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superchiku wrote:
plzz can u explain me how to use fuse bits and how to change them i have got no idea abt them

Please, can you explain what part of the datasheet you did read in the last hour?

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well the flash programming and memory programming those are the parts i read abt fuse bits

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ok i know how to do it but wat are the commands for reading low and high fuse bits and writing these bits???

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Try reading the documentation for your programmer!!

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The process is different for each programmer.

And, watch out! Atmel uses a strange notation for "programmed" and some of the programmers have a history of users with problems. The worst is that you can accidently turn off the internal oscillator and have no way to program it again.

Jim

 

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ok ill look about that