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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RM0312 датащи(PDF) 163 Page - STMicroelectronics |
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RM0312 датащи(HTML) 163 Page - STMicroelectronics |
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163 / 275 page  DocID022352 Rev 3 163/275 RM0312 8-bit basic timer (TIM4) 170 18 8-bit basic timer (TIM4) 18.1 Introduction The timer consists of an 8-bit auto-reload up-counter driven by a programmable prescaler. It can be used for time base generation, with interrupt generation on timer overflow. Refer to Section 17.3 on page 107 for the general description of the timer features. Figure 64. TIM4 block diagram 18.2 TIM4 main features The main features include: • 8-bit up counter auto-reload counter • 4-bit programmable prescaler allowing dividing (also “on the fly”) the counter clock frequency by any power of 2 from 1 to 32768. • Interrupt generation – On counter update: counter overflow – On trigger input 18.3 TIM4 interrupts The timer has 2 interrupt request sources: • Update Interrupt (overflow, counter initialization) • Trigger input Prescaler AutoReload Register UP-COUNTER UEV Stop or Clear UIF Reg event Legend: Preload registers transferred to shadow registers on update interrupt CK_PSC CK_CNT fMASTER TGI TIM4_TRGO to other timers ITR = TRC= TRGI TRGO from TIM3 (ITR2) TRGO from TIM2 (ITR3) UEV control bit event (UEV) according to CLOCK/TRIGGER CONTROLLER TIME BASE UNIT |
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