ATA5771 ATMEL Corporation, ATA5771 Datasheet - Page 158

• Manufacturer Part Number: ATA5771
• Manufacturer: ATMEL Corporation

106
ATtiny24/44/84
Figure 12-11 on page 106
Figure 12-11. Timer/Counter Timing Diagram, Setting of OCF1x, with Prescaler (f
Figure 12-12 on page 106
using phase and frequency correct PWM mode the OCR1x Register is updated at BOTTOM.
The timing diagrams will be the same, but TOP should be replaced by BOTTOM, TOP-1 by
BOTTOM+1 and so on. The same renaming applies for modes that set the TOV1 flag at
BOTTOM.
Figure 12-12. Timer/Counter Timing Diagram, no Prescaling
Figure 12-13 on page 107
(PC and PFC PWM)
OCRnx
TCNTn
OCFnx
(clk
and ICFn
(CTC and FPWM)
clk
(Update at TOP)
clk
TOVn
I/O
I/O
Tn
OCRnx
TCNTn
TCNTn
(clk
as TOP)
/8)
clk
clk
I/O
(FPWM)
I/O
Tn
/1)
(if used
OCRnx - 1
TOP - 1
TOP - 1
shows the same timing data, but with the prescaler enabled.
shows the same timing data, but with the prescaler enabled.
shows the count sequence close to TOP in various modes. When
Old OCRnx Value
OCRnx
OCRnx Value
TOP
TOP
OCRnx + 1
BOTTOM
TOP - 1
New OCRnx Value
BOTTOM + 1
OCRnx + 2
clk_I/O
8006G–AVR–01/08
TOP - 2
/8)