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ATmega32A Datasheet(PDF) 37 Page - ATMEL Corporation

Part # ATmega32A
Description  8-bit Microcontroller with 32K Bytes In-System Programmable Flash
PDF  352 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega32A Datasheet(HTML) 37 Page - ATMEL Corporation

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37
8155B–AVR–07/09
ATmega32A
The SE bit must be written to logic one to make the MCU enter the sleep mode when the SLEEP
instruction is executed. To avoid the MCU entering the sleep mode unless it is the programmers
purpose, it is recommended to write the Sleep Enable (SE) bit to one just before the execution of
the SLEEP instruction and to clear it immediately after waking up.
• Bits 6:4 – SM2:0: Sleep Mode Select Bits 2, 1, and 0
These bits select between the six available sleep modes as shown in Table 9-2.
Note:
1. Standby mode and Extended Standby mode are only available with external crystals or
resonators.
Table 9-2.
Sleep Mode Select
SM2
SM1
SM0
Sleep Mode
000
Idle
0
0
1
ADC Noise Reduction
010
Power-down
011
Power-save
100
Reserved
101
Reserved
110
Standby(1)
1
1
1
Extended Standby(1)



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