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Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??)
From: |
Joerg Wunsch |
Subject: |
Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??) |
Date: |
Thu, 17 Nov 2005 07:09:24 +0100 (MET) |
Vincent Trouilliez <address@hidden> wrote:
> About the fuse bits that have a reversed logic, I am not sure why
> the data sheet keeps insisting that 0 means programmed and 1
> unprogrammed.
I thought I wrote about it in the FAQ... Basically, it's because
these are EEPROM cells, and the manufactured ``unprogrammed'' value of
any PROM is a `1' bit. See, if you erase your flash, you'll get 0xff
as well, and then you're going to program those cells you need to a
`0' bit.
--
cheers, J"org .-.-. --... ...-- -.. . DL8DTL
http://www.sax.de/~joerg/ NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), (continued)
- 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, 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 ??), 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 <=
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Dan, 2005/11/17
- Re: [avr-chat] Crystals (was ATmega32 @ 16MHz : fuse bits ??), Joerg Wunsch, 2005/11/17