参数资料
型号: MB9AF315MPMC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP80
封装: 0.50 MM PITCH, PLASTIC, LQFP-80
文件页数: 105/114页
文件大小: 1357K
代理商: MB9AF315MPMC
ATmega48PA/88PA/168PA [DATASHEET]
9223F–AVR–04/14
90
15.8
Timer/Counter Timing Diagrams
The Timer/Counter is a synchronous design and the timer clock (clkT0) is therefore shown as a clock enable signal in the
following figures. The figures include information on when interrupt flags are set. Figure 15-8 contains timing data for basic
Timer/Counter operation. The figure shows the count sequence close to the MAX value in all modes other than phase
correct PWM mode.
Figure 15-8. Timer/Counter Timing Diagram, no Prescaling
Figure 15-9 shows the same timing data, but with the prescaler enabled.
Figure 15-9. Timer/Counter Timing Diagram, with Prescaler (fclk_I/O/8)
Figure 15-10 shows the setting of OCF0B in all modes and OCF0A in all modes except CTC mode and PWM mode, where
OCR0A is TOP.
Figure 15-10.Timer/Counter Timing Diagram, Setting of OCF0x, with Prescaler (fclk_I/O/8)
MAX - 1
clkI/O
(clkI/O/1)
TCNTn
TOVn
clkTn
MAX
BOTTOM
BOTTOM + 1
MAX - 1
clkI/O
(clkI/O/8)
TCNTn
TOVn
clkTn
MAX
BOTTOM
BOTTOM + 1
OCRnx - 1
clkI/O
(clkI/O/8)
TCNTn
OCRnx
OCFnx
clkTn
OCRnx
OCRnx + 1
OCRnx Value
OCRnx + 2
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