ATA6613 ATMEL Corporation, ATA6613 Datasheet - Page 62

• Manufacturer Part Number: ATA6613
• Description: Ata6613
• Manufacturer: ATMEL Corporation

6.7
62
Power Management and Sleep Modes
ATA6612/ATA6613
Table 6-17.
Sleep modes enable the application to shut down unused modules in the MCU, thereby saving
power. The AVR provides various sleep modes allowing the user to tailor the power consump-
tion to the application’s requirements.
To enter any of the five sleep modes, the SE bit in SMCR must be written to logic one and a
SLEEP instruction must be executed. The SM2, SM1, and SM0 bits in the SMCR Register select
which sleep mode (Idle, ADC Noise Reduction, Power-down, Power-save, or Standby) will be
activated by the SLEEP instruction. See
interrupt occurs while the MCU is in a sleep mode, the MCU wakes up. The MCU is then halted
for four cycles in addition to the start-up time, executes the interrupt routine, and resumes exe-
cution from the instruction following SLEEP. The contents of the Register File and SRAM are
unaltered when the device wakes up from sleep. If a reset occurs during sleep mode, the MCU
wakes up and executes from the Reset Vector.
Figure 6-11 on page 51
distribution. The figure is helpful in selecting an appropriate sleep mode.
CLKPS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Clock Prescaler Select
CLKPS2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
presents the different clock systems in the ATA6612/ATA6613, and their
CLKPS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Table 6-18 on page 63
CLKPS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
for a summary. If an enabled
Clock Division Factor
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
128
256
16
32
64
1
2
4
8
9111C–AUTO–02/08