Rainbow-electronics ATtiny43U Manual do Utilizador descarregar pdf (Página 89)

8048B–AVR–03/09

Figure 12-8. Timer/Counter Timing Diagram, no Prescaling

Figure 12-9 on page 89 shows the same timing data, but with the prescaler enabled.

Figure 12-9. Timer/Counter Timing Diagram, with Prescaler (f

clk_I/O

/8)

Figure 12-10 on page 89 shows the setting of OCFnB in all modes and OCFnA in all modes

except CTC mode and PWM mode, where OCRnA is TOP.

Figure 12-10. Timer/Counter Timing Diagram, Setting of OCFnx, with Prescaler (f

clk_I/O

/8)

Figure 12-11 on page 90 shows the setting of OCFnA and the clearing of TCNTn in CTC mode

and fast PWM mode where OCRnA is TOP.

clk

(clk

I/O

/1)

TOVn

clk

I/O

TCNTn MAX - 1 MAX BOTTOM BOTTOM + 1

TOVn

TCNTn

MAX - 1 MAX BOTTOM BOTTOM + 1

clk

I/O

clk

(clk

I/O

/8)

OCFnx

OCRnx

TCNTn

OCRnx Value

OCRnx - 1 OCRnx OCRnx + 1 OCRnx + 2

clk

I/O

clk

(clk

I/O

/8)

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 181 182

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Rainbow-electronics ATtiny43U Manual do Utilizador Página 89