ATmega325PA Atmel Corporation, ATmega325PA Datasheet - Page 45
ATmega325PA
Manufacturer Part Number
ATmega325PA
Description
Manufacturer
Atmel Corporation
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10.11.3
8285D–AVR–06/11
PRR – Power Reduction Register
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P
The BODS bit is active three clock cycles after it is set. A sleep instruction must be executed
while BODS is active in order to turn off the BOD for the actual sleep mode. The BODS bit is
automatically cleared after three clock cycles.
• Bit 5 – BODSE: BOD Sleep Enable
BODSE enables setting of BODS control bit, as explained in BODS bit description. BOD disable
is controlled by a timed sequence.
• Bit 7:4 - Reserved
These bits are reserved and will always read as zero.
• Bit 3 - PRTIM1: Power Reduction Timer/Counter1
Writing a logic one to this bit shuts down the Timer/Counter1 module. When the Timer/Counter1
is enabled, operation will continue like before the shutdown.
• Bit 2 - PRSPI: Power Reduction Serial Peripheral Interface
Writing a logic one to this bit shuts down the Serial Peripheral Interface by stopping the clock to
the module. When waking up the SPI again, the SPI should be re initialized to ensure proper
operation.
• Bit 1 - PRUSART0: Power Reduction USART0
Writing a logic one to this bit shuts down the USART by stopping the clock to the module. When
waking up the USART again, the USART should be re initialized to ensure proper operation.
• Bit 0 - PRADC: Power Reduction ADC
Writing a logic one to this bit shuts down the ADC. The ADC must be disabled before shut down.
The analog comparator cannot use the ADC input MUX when the ADC is shut down.
Note:
Bit
(0x64)
Read/Write
Initial Value
The Analog Comparator is disabled using the ACD-bit in the
and Status Register” on page
R
7
–
0
R
6
–
0
R
5
–
0
212.
R
4
–
0
PRTIM1
R/W
3
0
PRSPI
R/W
2
0
”ACSR – Analog Comparator Control
PRUSART0
R/W
1
0
PRADC
R/W
0
0
PRR
45
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