Datasheet

Figure 21-9 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 next figure shows the setting of OCF0 in all modes except CTC mode.
Figure 21-10 Timer/Counter Timing Diagram, Setting of OCF0, with Prescaler (f
clk_I/O
/8)
OCFn
OCRn
TCNTn
OCRn Value
OCRn - 1 OCRn OCRn + 1 OCRn + 2
clk
I/O
clk
Tn
(clk
I/O
/8)
The figure below shows the setting of OCF0 and the clearing of TCNT0 in CTC mode.
Figure 21-11 Timer/Counter Timing Diagram, Clear Timer on Compare Match Mode, with Prescaler (f
clk_I/O
/8)
OCFn
OCRn
TCNTn
(CTC)
TOP
TOP - 1 TOP BOTTOM BOTTOM + 1
clk
I/O
clk
Tn
(clk
I/O
/8)
Atmel ATmega64A [DATASHEET]
Atmel-8160E-ATmega64A_Datasheet_Complete-09/2015
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