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ATmega644PA Datasheet(PDF) 50 Page - ATMEL Corporation |
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ATmega644PA Datasheet(HTML) 50 Page - ATMEL Corporation |
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50 / 468 page  50 8152G–AVR–11/09 ATmega164PA/324PA/644PA/1284P • 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 USART0 by stopping the clock to the module. When waking up the USART0 again, the USART0 should be reinitialized 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. |
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