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XMEGA A [MANUAL]
8077I–AVR–11/2012
Bit 2 – DAC: Power Reduction DAC
Setting this bit stops the clock to the DAC. The DAC should be disabled before stopped.
Bit 1 – ADC: Power Reduction ADC
Setting this bit stops the clock to the ADC. The ADC should be disabled before stopped.
Bit 0 – AC: Power Reduction Analog Comparator
Setting this bit stops the clock to the analog comparator. The AC should be disabled before shutdown.
8.7.3
PRPC/D/E/F – Power Reduction Port C/D/E/F register
Bit 7 – Reserved
This bit is unused and reserved for future use. For compatibility with future devices, always write this bit to zero when this
register is written.
Bit 6 – TWI: Two-Wire Interface
Setting this bit stops the clock to the two-wire interface. When this bit is cleared, the peripheral should be reinitialized to
ensure proper operation.
Bit 5 – USART1
Setting this bit stops the clock to USART1. When this bit is cleared, the peripheral should be reinitialized to ensure proper
operation.
Bit 4 – USART0
Setting this bit stops the clock to USART0. When this bit is cleared, the peripheral should be reinitialized to ensure proper
operation.
Bit 3 – SPI: Serial Peripheral Interface
Setting this bit stops the clock to the SPI. When this bit is cleared, the peripheral should be reinitialized to ensure proper
operation.
Bit 2 – HIRES: High-Resolution Extension
Setting this bit stops the clock to the high-resolution extension for the timer/counters. When this bit is cleared, the
peripheral should be reinitialized to ensure proper operation.
Bit 1 – TC1: Timer/Counter 1
Setting this bit stops the clock to timer/counter 1. When this bit is cleared, the peripheral will continue like before the shut
down.
Bit 0 – TC0: Timer/Counter 0
Setting this bit stops the clock to timer/counter 0. When this bit is cleared, the peripheral will continue like before the shut
down.
Bit
7
654
3210
+0x03/+0x04/+0x05/+0x06
–
TWI
USART1
USART0
SPI
HIRES
TC1
TC0
Read/Write
R
R/W
Initial Value
0
000
0000
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