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AT90SCR100 데이터시트(PDF) 125 Page - ATMEL Corporation

부품명 AT90SCR100
상세설명  8-bit Microcontroller for Smart Card Readers
PDF  433 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90SCR100 데이터시트(HTML) 125 Page - ATMEL Corporation

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TPR0327AY–SMS–30Jan09
AT90SCR100
Figure 13-22.
Timer/Counter Timing Diagram, Setting of OCF1x, with Prescaler (fclk_I/O/8)
Figure 13-23 shows the count sequence close to TOP in various modes. When 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 13-23.
Timer/Counter Timing Diagram, no Prescaling
Figure 13-24 shows the same timing data, but with the prescaler enabled.
OCF1x
OCR1x
TCNT1
OCR1x Value
OCR1x - 1
OCR1x
OCR1x + 1
OCR1x + 2
clk
I/O
clk
Tn
(clk
I/O /8)
TOV1(FPWM)
and ICF1(if used
as TOP)
OCR1x
(Update at TOP)
TCNT1
(CTC and FPWM)
TCNT1
(PC and PFC PWM)
TOP - 1
TOP
TOP - 1
TOP - 2
Old OCR1x Value
New OCR1x Value
TOP - 1
TOP
BOTTOM
BOTTOM + 1
clk
Tn
(clk
I/O /1)
clk
I/O



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