Datasheet

157
8284D–AVR–6/11
ATmega169A/PA/329A/PA/3290A/PA/649A/P/6490A/P
Figure 18-9 shows the same timing data, but with the prescaler enabled.
Figure 18-9. Timer/Counter Timing Diagram, with Prescaler (f
clk_I/O
/8)
Figure 18-10 shows the setting of OCF2A in all modes except CTC mode.
Figure 18-10. Timer/Counter Timing Diagram, Setting of OCF2A, with Prescaler (f
clk_I/O
/8)
Figure 18-11 on page 158 shows the setting of OCF2A and the clearing of TCNT2 in CTC mode.
TOVn
TCNTn
MAX - 1 MAX BOTTOM BOTTOM + 1
clk
I/O
clk
Tn
(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)