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AT90PWM3 Datasheet(PDF) 134 Page - ATMEL Corporation |
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AT90PWM3 Datasheet(HTML) 134 Page - ATMEL Corporation |
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134 / 361 page ![]() 134 4317J–AVR–08/10 AT90PWM2/3/2B/3B 16.5 Functional Description 16.5.1 Waveform Cycles The waveform generated by PSC can be described as a sequence of two waveforms. The first waveform is relative to PSCOUTn0 output and part A of PSC. The part of this waveform is sub-cycle A in the following figure. The second waveform is relative to PSCOUTn1 output and part B of PSC. The part of this wave- form is sub-cycle B in the following figure. The complete waveform is ended with the end of sub-cycle B. It means at the end of waveform B. Figure 16-4. Cycle Presentation in 1, 2 & 4 Ramp Mode Figure 16-5. Cycle Presentation in Centered Mode Ramps illustrate the output of the PSC counter included in the waveform generators. Centered Mode is like a one ramp mode which count down up and down. Notice that the update of a new set of values is done regardless of ramp Mode at the top of the last ramp. 4 Ramp Mode 2 Ramp Mode 1 Ramp Mode Sub-Cycle A Sub-Cycle B PSC Cycle UPDATE Ramp A0 Ramp A1 Ramp B0 Ramp B1 Ramp A Ramp B PSC Cycle UPDATE Centered Mode |
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