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AT90SCR100 数据表(PDF) 46 Page - ATMEL Corporation |
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AT90SCR100 数据表(HTML) 46 Page - ATMEL Corporation |
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46 / 433 page ![]() 46 TPR0327AY–SMS–30Jan09 AT90SCR100 • Bit 7 - PRTWI: Power Reduction TWI Writing a logic one to this bit shuts down the TWI by stopping the clock to the module. When waking up the TWI again, the TWI should be re initialized to ensure proper operation. • Bit 6 - PRTIM2: Power Reduction Timer/Counter2 Writing a logic one to this bit shuts down the Timer/Counter2 module in synchronous mode (AS2 is 0). When the Timer/Counter2 is enabled, operation will continue like before the shutdown. • Bit 5 - 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 as before the shutdown. • Bit 4 - Res: Reserved bit Reserved for future use 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 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 - Res: Reserved bit Reserved for future use and will always read as zero. 8.2.3 PRR1 – Power Reduction Register 1 The Power Reduction Register allows the shut down of peripherals directly connected to CPU resources. These peripherals are activated by default and can be shut down for power con- sumption reasons if they are not used by an application. • Bit 7 - Res: Reserved bit Reserved for future use and will always read as zero. • Bit 6 - Res: Reserved bit Reserved for future use and will always read as zero. • Bit 5 - PRKB: Power Reduction Keyboard Bit 76543 2 1 0 $000065 - - PRKB PRAES PRSCI PRHSSPI PRUSB PRUSBH PRR1 Read/write R/W R/W R/W R R/W R/W R/W R Initial value 00000 0 0 0 0x00 |
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