ATA8741 ATMEL Corporation, ATA8741 Datasheet - Page 54

• Manufacturer Part Number: ATA8741
• Manufacturer: ATMEL Corporation

15.8.2
54
ATA8741
PRR – Power Reduction Register
• Bits 7, 6, 5, 4- Res: Reserved Bits
These bits are reserved bits in the ATtiny24/44/84 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- PRTIM0: Power Reduction Timer/Counter0
Writing a logic one to this bit shuts down the Timer/Counter0 module. When the Timer/Counter0
is enabled, operation will continue like before the shutdown.
• Bit 1 - PRUSI: Power Reduction USI
Writing a logic one to this bit shuts down the USI by stopping the clock to the module. When
waking up the USI again, the USI 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.
Bit
Read/Write
Initial Value
R
7
–
0
R
6
–
0
R
5
–
0
R
4
–
0
PRTIM1
R/W
3
0
PRTIM0
R/W
2
0
PRUSI
R/W
1
0
PRADC
R/W
9140B–INDCO–07/09
0
0
PRR