Rainbow-electronics ATtiny10 Manual do Utilizador descarregar pdf (Página 70)

8127B–AVR–08/09

ATtiny4/5/9/10

Figure 11-13. Timer/Counter Timing Diagram, Setting of OCF0x, with Prescaler (f

clk_I/O

/8)

Figure 11-14 on page 70 shows the count sequence close to TOP in various modes. When

using phase and frequency correct PWM mode the OCR0x 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 TOV0 flag at

BOTTOM.

Figure 11-14. Timer/Counter Timing Diagram, no Prescaling

Figure 11-15 on page 71 shows the same timing data, but with the prescaler enabled.

OCFnx

OCRnx

TCNTn

OCRnx Value

OCRnx - 1 OCRnx OCRnx + 1 OCRnx + 2

clk

I/O

clk

(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

1 2 ... 65 66 67 68 69 70 71 72 73 74 75 ... 165 166

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