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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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ATSAM3U Arkusz danych(PDF) 20 Page - ATMEL Corporation |
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ATSAM3U Arkusz danych(HTML) 20 Page - ATMEL Corporation |
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20 / 62 page  20 6430CS–ATARM–09-Apr-10 SAM3U Series Entering Wait Mode: • Select the 4/8/12 MHz Fast RC Oscillator as Main Clock • Set the LPM bit in the PMC Fast Startup Mode Register (PMC_FSMR) • Execute the Wait-For-Event (WFE) instruction of the processor Note: Internal Main clock resynchronization cycles are necessary between the writing of MOSCRCEN bit and the effective entry in Wait mode. Depending on the user application, Waiting for MOSCRCEN bit to be cleared is recommended to ensure that the core will not execute undesired instructions. 5.5.3 Sleep Mode The purpose of sleep mode is to optimize power consumption of the device versus response time. In this mode, only the core clock is stopped. The peripheral clocks can be enabled. This mode is entered via Wait for Interrupt (WFI) or Wait for Event (WFE) instructions with LPM = 0 in PMC_FSMR. The processor can be awakened from an interrupt if WFI instruction of the Cortex M3 is used, or from an event if the WFE instruction is used to enter this mode. |
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