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T48C862x-Rf-TNQ датащи(PDF) 86 Page - ATMEL Corporation |
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T48C862x-Rf-TNQ датащи(HTML) 86 Page - ATMEL Corporation |
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86 / 107 page ![]() 86 T48C862-R4 [Preliminary] 4551C–4BMCU–01/04 Figure 85. Frequency Measurement Figure 86. Event Counter with Time Gate Combination Mode 11: Burst Modulation 1 Timer 2 mode 1/2: 12-bit compare counter/8-bit compare counter and 4-bit prescaler Timer 2 output mode 1/6: Timer 2 compare match toggles the output flip-flop (M2) to the Timer 3 Timer 3 mode 6: Carrier frequency burst modulation controlled by Timer 2 output (M2) The Timer 3 counter is driven by an internal or external clock source. Its compare and compare mode registers must be programmed to generate the carrier frequency with the output toggle flip-flop. The output toggle flip-flop (M2) of Timer 2 is used to enable and disable the Timer 3 output. The Timer 2 can be driven by the toggle output signal of Timer 3 (TOG3) or any other clock source. Figure 87. Burst Modulation 1 001 2345 6789 10 Counter 3 TOG2 T3CP- Register T3I T3R Capture value = 0 Capture value = 17 Capt. value = 18 11121314151617 12 3 4 5 6789 101112131415161718 0 0 123 45 00 1 234 5 6 7 8 9 10 Counter 3 TOG2 T3CP- Register 11 0 1 2 40 1 T3I 2 3 T3R Capture value = 0 Capture value = 11 Cap. val. = 4 01 0 1 2 3 4 5 0 101 2 3 4 5 0 1 0 1 2 3 45 0 1 0 1 5 0 1 0 1 5 0 1 0 1 5 0 1 0 1 5 0 10 1 5 0 1 0 1 5 0 1 0 1 5 0 1 0 1 5 0 10 1 5 0 1 0 1 30 1 2 3 3 0 1 3 2 CL3 Counter 3 CM1 CM2 TOG3 M3 Counter 2/2 TOG2 M2 T3O |
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