ATMEGA48P_10 Datasheet, PDF (103/420 Pages) ATMEL Corporation – 8-bit Microcontroller with 4/8/16K Bytes In-System Programmable Flash

ATmega48P/88P/168P
Figure 14-10. Timer/Counter Timing Diagram, Setting of OCF0x, 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 and fast
PWM mode where OCR0A is TOP.
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
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