[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [avr-chat] avrdude-ATMega32 fuse bits issues
From: |
Neil Davey |
Subject: |
Re: [avr-chat] avrdude-ATMega32 fuse bits issues |
Date: |
Wed, 21 Dec 2005 16:57:04 +1000 |
User-agent: |
Mozilla Thunderbird 1.0.7 (Windows/20050923) |
Hi Chris,
You could be running into a couple of problems... As Joerg pointed out,
breadboards/proto boards and high speed devices generally are an unhappy
mix if your not careful..
They do generally have higher capacitancies than a pcb board, so you may
have to lower, or even remove the 22pf caps on the crystal, as the extra
capacitance in the board could be loading the crystal to much... if you
can, try a slower crystal also...
Also you are using a the basic bsd programmer (resistors off the
parallel port) this *should* be ok, but I've never been a big fan of
it... I use a 4050 non inverting buffer between the parallel port and
the avr, and power it from the circuit supply rail...
Regards
Neil
address@hidden wrote:
Hello,
I am having quite a bit of trouble with the fuse bits and I have 4
chips which exhibit this issue. I am able to program the chip with
the default factory settings and it functions fine. However, I need
to use a 16Mhz external crystal. So I have that hooked up between the
two XTAL pins with two 22pF caps to gnd.
--
--------------------------------------
Neil Davey
Griffith University
School of Microelectronic Engineering
Nathan Campus
Phone: 07-3735-7008
Fax: 07-3735-5112
School of Psychology - ACNRC
Mt Gravatt Campus
Phone: 07-3735-3395
--------------------------------------
- Re: [avr-chat] avrdude-ATMega32 fuse bits issues, (continued)
- Re: [avr-chat] avrdude-ATMega32 fuse bits issues, Chris Pontiga, 2005/12/20
- Re: [avr-chat] avrdude-ATMega32 fuse bits issues, Graham Davies, 2005/12/21
- Re: [avr-chat] avrdude-ATMega32 fuse bits issues, Brian Dean, 2005/12/21
- Re: [avr-chat] avrdude-ATMega32 fuse bits issues, Graham Davies, 2005/12/21
- Re: [avr-chat] avrdude-ATMega32 fuse bits issues, Richard Urwin, 2005/12/21
- CKOPT (was Re: [avr-chat] avrdude-ATMega32 fuse bits issues), Graham Davies, 2005/12/21
- Re: CKOPT (was Re: [avr-chat] avrdude-ATMega32 fuse bits issues), Richard Urwin, 2005/12/22
- Re: CKOPT (was Re: [avr-chat] avrdude-ATMega32 fuse bits issues), Daniel O'Connor, 2005/12/22
Re: [avr-chat] avrdude-ATMega32 fuse bits issues,
Neil Davey <=