Rainbow-electronics Atmega169L Manual do Utilizador descarregar pdf (Página 115)

100

101

115

ATmega169V/L

2514A–AVR–08/02

Figure 50. Timer/Counter Timing Diagram, no Prescaling

Figure 51 shows the same timing data, but with the prescaler enabled.

Figure 51. 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

(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

(clk

I/O

/8)

1 2 ... 110 111 112 113 114 115 116 117 118 119 120 ... 316 317

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