Made mistake with fuse on Mega88: set to external crystal. Can it be fixed without parallel programming?
2009-12-18 by Cat C
Hi, The subject says it all. I don't think I can fix it with ISP, but might JTAG work? With a Dragon? Thanks, Cat
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Made mistake with fuse on Mega88: set to external crystal. Can it be fixed without parallel programming?
Re: [AVR-Chat] Made mistake with fuse on Mega88: set to external crystal. Can it be fixed without parallel programming?
2009-12-18 by Jim Wagner
On Dec 18, 2009, at 7:19 AM, Cat C wrote: > > Hi, > The subject says it all. > I don't think I can fix it with ISP, but might JTAG work? > With a Dragon? > > Thanks, > > Cat > > Make an external oscillator! An 74HC04 (I think thats it, quad inverter). Put a 4.7Meg feedback resistor around one, add crystal and 2 caps. Apply power & ground and connect output to XTAL1, and you should be good to go. Jim Wagner Oregon Research Electronics [Non-text portions of this message have been removed]
Re: [AVR-Chat] Made mistake with fuse on Mega88: set to external crystal. Can it be fixed without parallel programming?
2009-12-18 by Jim Wagner
Should have said hex inverter! Jim Wagner
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On Dec 18, 2009, at 7:51 AM, Jim Wagner wrote: > > On Dec 18, 2009, at 7:19 AM, Cat C wrote: > >> >> Hi, >> The subject says it all. >> I don't think I can fix it with ISP, but might JTAG work? >> With a Dragon? >> >> Thanks, >> >> Cat >> >> > Make an external oscillator! An 74HC04 (I think thats it, quad > inverter). Put a 4.7Meg feedback resistor around one, add crystal and > 2 caps. Apply power & ground and connect output to XTAL1, and you > should be good to go. > > Jim Wagner > Oregon Research Electronics > > [Non-text portions of this message have been removed] > > > > ------------------------------------ > > Yahoo! Groups Links > > >
RE: [AVR-Chat] Made mistake with fuse on Mega88: set to external crystal. Can it be fixed without parallel programming?
2009-12-18 by Cat C
Thank you Jim. That reminds me that I do have all kind of signal generators :-) Cat ----------------------------------------
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> To: AVR-Chat@yahoogroups.com > From: wagnerj@proaxis.com > Date: Fri, 18 Dec 2009 08:06:13 -0800 > Subject: Re: [AVR-Chat] Made mistake with fuse on Mega88: set to external crystal. Can it be fixed without parallel programming? > > Should have said hex inverter! > > Jim Wagner > > On Dec 18, 2009, at 7:51 AM, Jim Wagner wrote: > >> >> On Dec 18, 2009, at 7:19 AM, Cat C wrote: >> >>> >>> Hi, >>> The subject says it all. >>> I don't think I can fix it with ISP, but might JTAG work? >>> With a Dragon? >>> >>> Thanks, >>> >>> Cat >>> >>> >> Make an external oscillator! An 74HC04 (I think thats it, quad >> inverter). Put a 4.7Meg feedback resistor around one, add crystal and >> 2 caps. Apply power & ground and connect output to XTAL1, and you >> should be good to go. >> >> Jim Wagner >> Oregon Research Electronics