Figure – Rainbow Electronics ATtiny43U User Manual
Page 89
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89
8048B–AVR–03/09
Figure 12-8. Timer/Counter Timing Diagram, no Prescaling
shows the same timing data, but with the prescaler enabled.
Figure 12-9. Timer/Counter Timing Diagram, with Prescaler (f
clk_I/O
/8)
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)
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)
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