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Hi everyone. I am doing a project using ATMEGA169P. Can anyone tell me how to set the system clock as external oscillator. I am using crystal of frequency 16MHz. There are no registers to make system clock settings.

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What programmer are you using? It's done with the fuse bits.

The STK500, in combination with AVRStudio, has a window for the fuse bits
which you select by clicking the appropriate box.

Zack

On Mon, 19 May 2008, n...@gmail.com wrote:

>
> Hi everyone. I am doing a project using ATMEGA169P. Can anyone tell me how to set the system clock as external oscillator. I am using crystal of frequency 16MHz. There are no registers to make system clock settings.
>

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(You need to be a member of avrclub -- send a blank email to avrclub-subscribe@yahoogroups.com )

=A0Dear Nandini,

What is your project? send Detail to me with some configu=
ration. I will help you out.just reply this mail .

Rgds,
Kundan
On Mon, 19 May 2008 n...@gmail.com wrote :
>
>Hi everyone. I am doing a project using ATMEGA169P. Can anyone tell me how=
to set the system clock as external oscillator. I am using crystal of freq=
uency 16MHz. There are no registers to make system clock settings.
Sr. FAE=0D
Excel Eltech inc. =0D
A-76, EOK. New Delhi=0D
110065=0D
ph:9811675688=0D
[Non-text portions of this message have been removed]
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(You need to be a member of avrclub -- send a blank email to avrclub-subscribe@yahoogroups.com )

If your 169P is anything like the other ATmel parts, the clock mode is
set with a fuse, not in your program. Figuring out how to set the
fuses can be intimidating. If it is like the ATtiny26 AVR then it
cannot be done over a ISP type programming, you need the high voltage
method to set the fuses (that is how it is on the ATtiny26)

This might help too.

http://palmavr.sourceforge.net/cgi-bin/fc.cgi?P_PREV=ATtiny2313&P=ATmega169&V_LOW=64&V_HIGH=DF&V_EXTENDED=FF&M_LOW_0x3F=0x24&M_LOW_0x40=&M_LOW_0x80=0x00&M_HIGH_0x01=&M_HIGH_0x0E=0x0E&M_HIGH_0x10=&M_HIGH_0x20=0x00&M_HIGH_0x40=&M_HIGH_0x80=&M_EXTENDED_0x01=&B_CKDIV8=P&B_SPIEN=P&B_SUT0=P&B_CKSEL3=P&B_CKSEL1=P&B_CKSEL0=P

regards

M5

--- In a...@yahoogroups.com, "raj" wrote:
>
> Dear Nandini,
>
> What is your project? send Detail to me with some
configuration. I will help you out.just reply this mail .
>
> Rgds,
> Kundan
> On Mon, 19 May 2008 n.nandini08@... wrote :
> >
> >Hi everyone. I am doing a project using ATMEGA169P. Can anyone tell
me how to set the system clock as external oscillator. I am using
crystal of frequency 16MHz. There are no registers to make system
clock settings.
> Sr. FAE
> Excel Eltech inc.
> A-76, EOK. New Delhi
> 110065
> ph:9811675688
> [Non-text portions of this message have been removed]
>

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