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ATMEGA16 Datasheet(PDF) 103 Page - ATMEL Corporation |
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ATMEGA16 Datasheet(HTML) 103 Page - ATMEL Corporation |
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103 / 315 page ![]() 103 ATmega16(L) 2466E–AVR–10/02 Figure 51 shows the count sequence close to TOP in various modes. When using phase and frequency correct PWM mode the OCR1x Register is updated at BOTTOM. The timing diagrams will be the same, but TOP should be replaced by BOTTOM, TOP-1 by BOTTOM+1 and so on. The same renaming applies for modes that set the TOV1 flag at BOTTOM. Figure 51. Timer/Counter Timing Diagram, no Prescaling Figure 52 shows the same timing data, but with the prescaler enabled. Figure 52. Timer/Counter Timing Diagram, with Prescaler (f clk_I/O/8) TOVn (FPWM) and ICFn (if used as TOP) OCRnx (Update at TOP) TCNTn (CTC and FPWM) TCNTn (PC and PFC PWM) TOP - 1 TOP TOP - 1 TOP - 2 Old OCRnx Value New OCRnx Value TOP - 1 TOP BOTTOM BOTTOM + 1 clk Tn (clk I/O/1) clk I/O TOVn (FPWM) and ICFn (if used as TOP) OCRnx (Update at TOP) TCNTn (CTC and FPWM) TCNTn (PC and PFC PWM) TOP - 1 TOP TOP - 1 TOP - 2 Old OCRnx Value New OCRnx Value TOP - 1 TOP BOTTOM BOTTOM + 1 clk I/O clk Tn (clk I/O/8) |
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