A more comprehensive description of various fuse bytes is available in Appendix B of the XMesh manual below. http://www.xbow.com/Support/Support_pdf_files/XMesh_Users_Manual.pdf
A low fuse byte value of 0xc4 would set it to internal oscillator. I think the ATmega128's internal RC oscillator can provide a fixed 1.0, 2.0, 4.0, or 8.0 MHz clock. Giri -----Original Message----- From: Michael Schippling [mailto:[EMAIL PROTECTED] Sent: Tuesday, July 17, 2007 10:17 PM To: Giri Baleri Cc: roberto pagliari; [email protected] Subject: Re: [Tinyos-help] atmega128 clock frequency whew...now I don't have to go look up the config bytes... Is there an internal osc that will run faster than the xtal? And are we certain that the config is really all 0xff? That sounds too conveniently like a read error... MS Giri Baleri wrote: > The low byte value of 0xff indicates that the ATmega128 is configured > to use external oscillator. The frequency of the external oscillator > is normally 7.3728 MHz. > > Giri > > ---------------------------------------------------------------------- > -- > *From:* [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] *On Behalf Of > *roberto pagliari > *Sent:* Tuesday, July 17, 2007 3:27 PM > *To:* [EMAIL PROTECTED] > *Cc:* [email protected] > *Subject:* Re: [Tinyos-help] atmega128 clock frequency > > my actual configuration, running > uisp -dprog=data -dpart=ATmega128 --rd_fuses > > gives me the following > fuse low byte 0xff > fuse high byte 0xff > fuse extended byte 0xff > calibration byte 0xff - read only > lock bits 0xff > > BLB12 -> 1 > BLB11 -> 1 > BLB02 -> 1 > BLB01 -> 1 > LB2 -> 1 > LB1 -> 1 > > so, is it 7.3Mhz? > > On 7/17/07, *roberto pagliari* <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > my fuse low byte is set to 0xff. this means the clock frequency is > 7.3Mhz (not 8Mhz) right? > > thank you in advance > > > On 7/17/07, *Michael Schippling* < [EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > I think "change the crystal" is the only answer for the ATMEGA. > It's sounds like the MSP can be overclocked in software though. > MS > > roberto pagliari wrote: > > how can I set the clock frequency of motes microcontroller? > > I'm using micaz mote right now > > > > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > Tinyos-help mailing list > > [email protected] > <mailto:[email protected]> > > > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-hel p > > <https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos- > help> > > > > > ---------------------------------------------------------------------- > -- > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-h > elp _______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
