Datasheet

155
7593L–AVR–09/12
AT90USB64/128
Figure 16-9 shows the same timing data, but with the prescaler enabled.
Figure 16-9. Timer/Counter timing diagram, with prescaler (f
clk_I/O
/8).
Figure 16-10 shows the setting of OCF2A in all modes except CTC mode.
Figure 16-10. Timer/Counter timing diagram, setting of OCF2A, with prescaler (f
clk_I/O
/8).
Figure 16-11 on page 156 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)