ATMEGA169P_14 Datasheet, PDF (101/395 Pages) ATMEL Corporation – High Performance, Low Power Atmel

ATmega169P
Figure 14-9. Timer/Counter Timing Diagram, with Prescaler (f_{clk_I/O}/8)
clk_I/O
clk_Tn
(clk_I/O/8)
TCNTn
MAX - 1
MAX
BOTTOM
TOVn
BOTTOM + 1
Figure 14-10 shows the setting of OCF0A in all modes except CTC mode.
Figure 14-10. Timer/Counter Timing Diagram, Setting of OCF0A, with Prescaler (f_{clk_I/O}/8)
clk_I/O
clk_Tn
(clk_I/O/8)
TCNTn
OCRnx - 1
OCRnx
OCRnx + 1
OCRnx + 2
OCRnx
OCRnx Value
OCFnx
Figure 14-11 shows the setting of OCF0A and the clearing of TCNT0 in CTC mode.
Figure 14-11. Timer/Counter Timing Diagram, Clear Timer on Compare Match mode, with Pres-
caler (f_{clk_I/O}/8)
clk_I/O
clk_Tn
(clk_I/O/8)
TCNTn
(CTC)
OCRnx
TOP - 1
TOP
TOP
BOTTOM
BOTTOM + 1
OCFnx
8018P–AVR–08/10
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