Rainbow Electronics ATtiny43U - Manual (Page 89)

89
8048B–AVR–03/09
Figure 12-8. Timer/Counter Timing Diagram, no Prescaling
Figure 12-9 on page 89 shows the same timing data, but with the prescaler enabled.
Figure 12-9. Timer/Counter Timing Diagram, with Prescaler (f
clk_I/O
/8)
Figure 12-10 on page 89 shows the setting of OCFnB in all modes and OCFnA in all modes
except CTC mode and PWM mode, where OCRnA is TOP.
Figure 12-10. Timer/Counter Timing Diagram, Setting of OCFnx, with Prescaler (f
clk_I/O
/8)
Figure 12-11 on page 90 shows the setting of OCFnA and the clearing of TCNTn in CTC mode
and fast PWM mode where OCRnA is TOP.
clk
Tn
(clk
I/O
/1)
TOVn
clk
I/O
TCNTn MAX - 1 MAX BOTTOM BOTTOM + 1
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)