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Re: [avr-chat] Power save mode in ATtiny85 vs avr-libc
From: |
Joerg Wunsch |
Subject: |
Re: [avr-chat] Power save mode in ATtiny85 vs avr-libc |
Date: |
Sun, 3 Jan 2010 08:50:23 +0100 (MET) |
Chris Kuethe <address@hidden> wrote:
> Is this a bug in avr-libc or do some of the newer hardware revisions
> also have power save mode?
If you manage to operate timer/counter 2 asynchronously from a
32 kHz crystal, avr-libc will support power-save mode for your
ATtiny85. ;-)
So yes, it's a bug in avr-libc, but a very minor one. The difference
between power-down and power-save mode is that in the latter,
timer/counter 2 will remain operational, with the intention that it
can be clocked asynchronously from a 32 kHz crystal. Obviously, for
hardware that does not support this modus of operation, power-save
mode makes no sense.
--
cheers, J"org .-.-. --... ...-- -.. . DL8DTL
http://www.sax.de/~joerg/ NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)