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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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ST7LITEUSX Fiches technique(PDF) 38 Page - STMicroelectronics |
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ST7LITEUSX Fiches technique(HTML) 38 Page - STMicroelectronics |
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38 / 108 page  ST7LITEUSx 38/108 POWER SAVING MODES (Cont’d) Similarities with Halt mode The following AWUFH mode behaviour is the same as normal Halt mode: – The MCU can exit AWUFH mode by means of any interrupt with exit from Halt capability or a re- set (see Section 8.4 ACTIVE-HALT AND HALT MODES). – When entering AWUFH mode, the I bit in the CC register is forced to 0 to enable interrupts. There- fore, if an interrupt is pending, the MCU wakes up immediately. – In AWUFH mode, the main oscillator is turned off causing all internal processing to be stopped, in- cluding the operation of the on-chip peripherals. None of the peripherals are clocked except those which get their clock supply from another clock generator (such as an external or auxiliary oscil- lator like the AWU oscillator). – The compatibility of watchdog operation with AWUFH mode is configured by the WDGHALT option bit in the option byte. Depending on this setting, the HALT instruction when executed while the watchdog system is enabled, can gen- erate a watchdog RESET. Figure 26. AWUF Halt Timing Diagram AWUFH interrupt fCPU RUN MODE HALT MODE 64 tCPU RUN MODE fAWU_RC Clear by software tAWU 1 |
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