Datasheet

Figure 22-9. Timer/Counter Timing Diagram, with Prescaler (f
clk_I/O
/8)
TOVn
TCNTn MAX - 1 MAX BOTTOM BOTTOM + 1
clk
I/O
clk
Tn
(clk
I/O
/8)
The following figure shows the setting of OCF2A in all modes except CTC mode.
Figure 22-10. Timer/Counter Timing Diagram, Setting of OCF2A, with Prescaler (f
clk_I/O
/8)
OCFnx
OCRnx
TCNTn
OCRnx Value
OCRnx - 1 OCRnx OCRnx + 1 OCRnx + 2
clk
I/O
clk
Tn
(clk
I/O
/8)
The following figure shows the setting of OCF2A and the clearing of TCNT2 in CTC mode.
Figure 22-11. Timer/Counter Timing Diagram, Clear Timer on Compare Match mode, with
Prescaler (f
clk_I/O
/8)
OCFnx
OCRnx
TCNTn
(CTC)
TOP
TOP - 1 TOP BOTTOM BOTTOM + 1
clk
I/O
clk
Tn
(clk
I/O
/8)
22.9 Asynchronous Operation of Timer/Counter2
When TC2 operates asynchronously, some considerations must be taken:
ATmega48PA/88PA/168PA
8-bit Timer/Counter2 (TC2) with PWM and A...
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Datasheet Complete
DS40002011A-page 210