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DOC7707 데이터시트(PDF) 128 Page - List of Unclassifed Manufacturers

부품명 DOC7707
상세설명  Microcontroller with 8/16K Bytes of ISP Flash and USB Controller
PDF  307 Pages
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제조업체  ETC1 [List of Unclassifed Manufacturers]
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DOC7707 데이터시트(HTML) 128 Page - List of Unclassifed Manufacturers

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7707F–AVR–11/10
AT90USB82/162
Figure 15-13. Timer/Counter Timing Diagram, with Prescaler (f
clk_I/O/8)
15.10 16-bit Timer/Counter Register Description
15.10.1
Timer/Counter1 Control Register A – TCCR1A
• Bit 7:6 – COMnA1:0: Compare Output Mode for Channel A
• Bit 5:4 – COMnB1:0: Compare Output Mode for Channel B
• Bit 3:2 – COMnC1:0: Compare Output Mode for Channel C
The COMnA1:0, COMnB1:0, and COMnC1:0 control the output compare pins (OCnA, OCnB,
and OCnC respectively) behavior. If one or both of the COMnA1:0 bits are written to one, the
OCnA output overrides the normal port functionality of the I/O pin it is connected to. If one or
both of the COMnB1:0 bits are written to one, the OCnB output overrides the normal port func-
tionality of the I/O pin it is connected to. If one or both of the COMnC1:0 bits are written to one,
the OCnC output overrides the normal port functionality of the I/O pin it is connected to. How-
ever, note that the Data Direction Register (DDR) bit corresponding to the OCnA, OCnB or
OCnC pin must be set in order to enable the output driver.
When the OCnA, OCnB or OCnC is connected to the pin, the function of the COMnx1:0 bits is
dependent of the WGMn3:0 bits setting. Table 15-1 shows the COMnx1:0 bit functionality when
the WGMn3:0 bits are set to a normal or a CTC mode (non-PWM).
TOVn(FPWM)
and ICF n(if used
as TOP)
OCRnx
(Update at TOP)
TCNTn
(CTC and FPWM)
TCNTn
(PC and PFC PWM)
TOP - 1
TOP
TOP - 1
TOP - 2
Old OCRnx Value
New OCRnx Value
TOP - 1
TOP
BOTTOM
BOTTOM + 1
clk
I/O
clk
Tn
(clk
I/O/8)
Bit
7
65
43
2
1
0
COM1A1
COM1A0
COM1B1
COM1B0
COM1C1
COM1C0
WGM11
WGM10
TCCR1A
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0



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