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-rw-r--r--docs/POWER.txt62
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-Time to Sleep
-=============
-USB suspend no activity on USB line for 3ms
-No Interaction no user interaction
- matrix has no change
- matrix has no switch on
-
-
-AVR Power Management
-====================
-
-V-USB suspend
- USB suspend
- http://vusb.wikidot.com/examples
-
-MCUSR MCU Status Register
- WDRF Watchdog Reset Flag
- BORF
- EXTRF
- PORF Power-on Reset Flag
-
-SMCR Sleep Mode Control Register
- SE Sleep Enable
- SM2:0
- #define set_sleep_mode(mode) \
- #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))
- #define SLEEP_MODE_STANDBY (_BV(SM1) | _BV(SM2))
- #define SLEEP_MODE_EXT_STANDBY (_BV(SM0) | _BV(SM1) | _BV(SM2))
-
-
-ACSR Analog Comparator Control and Status Register
- To disable Analog Comparator
- ACSR = 0x80;
- or
- ACSR &= ~_BV(ACIE);
- ACSR |= _BV(ACD);
-
- ACD: Analog Comparator Disable
- When this bit is written logic one, the power to the Analog Comparator is
- switched off. This bit can be set at any time to turn off the Analog
- Comparator. This will reduce power consumption in Active and Idle mode.
- When changing the ACD bit, the Analog Comparator Interrupt must be disabled
- by clearing the ACIE bit in ACSR. Otherwise an interrupt can occur when
- the bit is changed.
-
-DIDR1 Digital Input Disable Register 1
- AIN1D
- AIN0D
- When this bit is written logic one, the digital input buffer on the AIN1/0 pin is disabled. The corresponding PIN Register bit will always read as zero when this bit is set. When an analog signal is applied to the AIN1/0 pin and the digital input from this pin is not needed, this bit should be written logic one to reduce power consumption in the digital input buffer.
-
-
-PRR Power Reduction Register
- PRTWI
- PRTIM2
- PRTIM0
- PRTIM1
- PRSPI
- PRUSART0
- PRADC