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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M16C/1N датащи(PDF) 83 Page - Renesas Technology Corp |
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M16C/1N датащи(HTML) 83 Page - Renesas Technology Corp |
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83 / 238 page  Rev.1.00 Oct 20, 2004 page 71 of 222 M16C/1N Group 12. Timers REJ09B0007-0100Z Item Specification Count source f1, f8, f32, fC32 Count operation • Down count • When the timer underflows, it reloads the reload register contents before continuing counting Divide ratio n: Set value of Prescaler 1, m: Set value of Timer 1 Count start condition After reset Count stop condition Disable to stop counting Interrupt request generation timing When Timer 1 underflows Read from timer Count value can be read out by reading Timer 1 register. Same applies to Prescaler 1 register. Write to timer When a value is written to Timer 1 register, it is written to both reload register and counter. Same applies to Prescaler 1 register. Clock source selection f1 f8 f32 fC32 Prescaler 1 (address 008816) Peripheral data bus Reload register (8) Counter (8) Reload register (8) Counter (8) Timer 1 (address 008916) Timer 1 interrupt request bit fP1 1 (n+1) X (m+1) 12.1 Timer 1 Timer 1 is an 8-bit timer with an 8-bit prescaler. Figure 12.1 shows the block diagram of Timer 1. The timer constantly counts an internally generated count source (clock source). The count source after reset is set to f1. The timer cannot stop counting. Table 12.2 shows the specifications of Timer 1 and Figure 12.2 shows Timer 1 related registers. Figure 12.1 Block diagram of Timer 1 Table 12.2 Specifications of Timer 1 (Timer mode) |
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