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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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4513 датащи(PDF) 28 Page - Renesas Technology Corp |
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4513 датащи(HTML) 28 Page - Renesas Technology Corp |
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28 / 97 page  27 4513/4514 Group SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER MITSUBISHI MICROCOMPUTERS TIMERS The 4513/4514 Group has the programmable timers. • Programmable timer The programmable timer has a reload register and enables the frequency dividing ratio to be set. It is decremented from a setting value n. When it underflows (count to n + 1), a timer interrupt re- quest flag is set to “1,” new data is loaded from the reload register, and count continues (auto-reload function). • Fixed dividing frequency timer The fixed dividing frequency timer has the fixed frequency divid- ing ratio (n). An interrupt request flag is set to “1” after every n count of a count pulse. Fig. 18 Auto-reload function FF16 n 0016 n : Counter initial value Count starts Reload Reload 1st underflow 2nd underflow n+1 count n+1 count Time An interrupt occurs or a skip instruction is executed. Timer interrupt request flag “1” “0” |
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