power.txt
2017 bytes
1Time to Sleep
2=============
3USB suspend no activity on USB line for 3ms
4No Interaction no user interaction
5 matrix has no change
6 matrix has no switch on
7
8
9AVR Power Management
10====================
11
12V-USB suspend
13 USB suspend
14 http://vusb.wikidot.com/examples
15
16MCUSR MCU Status Register
17 WDRF Watchdog Reset Flag
18 BORF
19 EXTRF
20 PORF Power-on Reset Flag
21
22SMCR Sleep Mode Control Register
23 SE Sleep Enable
24 SM2:0
25 #define set_sleep_mode(mode) \
26 #define SLEEP_MODE_IDLE (0)
27 #define SLEEP_MODE_ADC _BV(SM0)
28 #define SLEEP_MODE_PWR_DOWN _BV(SM1)
29 #define SLEEP_MODE_PWR_SAVE (_BV(SM0) | _BV(SM1))
30 #define SLEEP_MODE_STANDBY (_BV(SM1) | _BV(SM2))
31 #define SLEEP_MODE_EXT_STANDBY (_BV(SM0) | _BV(SM1) | _BV(SM2))
32
33
34ACSR Analog Comparator Control and Status Register
35 To disable Analog Comparator
36 ACSR = 0x80;
37 or
38 ACSR &= ~_BV(ACIE);
39 ACSR |= _BV(ACD);
40
41 ACD: Analog Comparator Disable
42 When this bit is written logic one, the power to the Analog Comparator is
43 switched off. This bit can be set at any time to turn off the Analog
44 Comparator. This will reduce power consumption in Active and Idle mode.
45 When changing the ACD bit, the Analog Comparator Interrupt must be disabled
46 by clearing the ACIE bit in ACSR. Otherwise an interrupt can occur when
47 the bit is changed.
48
49DIDR1 Digital Input Disable Register 1
50 AIN1D
51 AIN0D
52 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.
53
54
55PRR Power Reduction Register
56 PRTWI
57 PRTIM2
58 PRTIM0
59 PRTIM1
60 PRSPI
61 PRUSART0
62 PRADC