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Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??)
From: |
Richard Urwin |
Subject: |
Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??) |
Date: |
Tue, 15 Nov 2005 00:24:38 +0000 |
User-agent: |
KMail/1.7.2 |
On Monday 14 Nov 2005 13:56, Vincent Trouilliez wrote:
> I use a large strip prototyping board, and add components to it over
> time as required/needed by the development of the software.
> I soldered the crystal and capacitors as closely as possible to the
> AVR chip, 4 tenths of inches from it maximum then. However due to the
> XTAL pins being next to each other, and the crystal having its
> terminals 2 tenth of inches apart, one of the crystal terminals is
> obviously a lot closer to the AVR than the other, so maybe the
> capacitance is unbalanced between the input and output of the
> oscillator, and this keeps the oscillator from starting ??
For what it's worth I have just built a ATmega16-16PI development board
on stripboard. I have a 12MHz crystal with the terminals 0.2 and 0.4
inches from their MCU pins and the capacitors 0.6 and 0.7 inches out
from the MCU. It runs fine.
--
Richard Urwin
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), (continued)
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Joerg Wunsch, 2005/11/12
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Anton Erasmus, 2005/11/12
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Bob Paddock, 2005/11/12
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Graham Davies, 2005/11/12
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Graham Davies, 2005/11/12
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Vincent Trouilliez, 2005/11/14
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Danilo Uccelli, 2005/11/14
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Graham Davies, 2005/11/14
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Joerg Wunsch, 2005/11/14
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Andy Warner, 2005/11/14
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??),
Richard Urwin <=
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Vincent Trouilliez, 2005/11/15
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Richard Urwin, 2005/11/16
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Vincent Trouilliez, 2005/11/17
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Erik Christiansen, 2005/11/14
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Neil Davey, 2005/11/14
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Vincent Trouilliez, 2005/11/15
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Graham Davies, 2005/11/15
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Vincent Trouilliez, 2005/11/15
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Joerg Wunsch, 2005/11/17
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Dan, 2005/11/17