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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M38B53M4-059FP датащи(PDF) 243 Page - Mitsubishi Electric Semiconductor |
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M38B53M4-059FP датащи(HTML) 243 Page - Mitsubishi Electric Semiconductor |
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243 / 355 page  38B5 Group User’s Manual APPLICATION 2-155 2.11 Clock generating circuit (2) Counting without clock error during power failure Outline: It keeps counting without clock error during a power failure. Specifications: •Reducing power consumption as low as possible while maintaining clock function •Clock: f(XIN) = 4.19 MHz •Sub clock: f(XCIN) = 32.768 kHz •Use of Timer 3 interrupt For the peripheral circuit and the status transition during a power failure, refer to “Figures 2.11.2 and 2.11.3”. Figure 2.11.6 shows the structure of clock counter, Figures 2.11.7 and 2.11.8 show the setting of relevant registers. Fig. 2.11.6 Structure of clock counter When the system returns from a power failure, add the time taken for the switching processing for the return. Timer 1 interrupt 1/256 Timer 2Timer 3 244 µs 1/16 f(XCIN) = 32.768 kHz 1/8 Timer 1 <At power failure> f(XIN) = 4.19 MHz Timer 1Base counter1 second counter1 minute counter 1/16 1/641/256 1/16 1/60 1 second Minute/Time/Day/ Month/Year 244 µs Timer 3 interrupt : Software timer : Hardware timer |
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