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Atmega162/v – Rainbow Electronics ATmega162V User Manual

Page 126

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126

ATmega162/V

2513E–AVR–09/03

Figure 57. Timer/Counter Timing Diagram, no Prescaling

Figure 58 shows the same timing data, but with the prescaler enabled.

Figure 58. 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)