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[avr-chat] Power save mode in ATtiny85 vs avr-libc

From: Chris Kuethe
Subject: [avr-chat] Power save mode in ATtiny85 vs avr-libc
Date: Sat, 2 Jan 2010 22:01:55 -0800

At least in avr-libc 1.6.7 the following sleep modes are defined for
the ATtiny85:

    #define SLEEP_MODE_IDLE         0
    #define SLEEP_MODE_ADC          _BV(SM0)
    #define SLEEP_MODE_PWR_DOWN     _BV(SM1)
    #define SLEEP_MODE_PWR_SAVE     (_BV(SM0) | _BV(SM1))

The latest revision of datasheet (rev K, Jan 08) says that there are
only three sleep modes:
       SM1              SM0          Sleep Mode
        0                 0          Idle
        0                 1          ADC Noise Reduction
        1                 0          Power-down
        1                 1          Reserved

Is this a bug in avr-libc or do some of the newer hardware revisions
also have power save mode? FYI, the parts I'm currently working with
are ATtiny85V-10PU, date code 0939.


GDB has a 'break' feature; why doesn't it have 'fix' too?

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