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ATmega162 bảng dữ liệu(PDF) 128 Page - ATMEL Corporation

tên linh kiện ATmega162
Giải thích chi tiết về linh kiện  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
PDF  324 Pages
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nhà sản xuất  ATMEL [ATMEL Corporation]
Trang chủ  http://www.atmel.com
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ATmega162 bảng dữ liệu(HTML) 128 Page - ATMEL Corporation

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2513K–AVR–07/09
ATmega162/V
16-bit
Timer/Counter
Register
Description
Timer/Counter1
Control Register A –
TCCR1A
Timer/Counter3
Control Register A –
TCCR3A
• Bit 7:6 – COMnA1:0: Compare Output Mode for channel A
• Bit 5:4 – COMnB1:0: Compare Output Mode for channel B
The COMnA1:0 and COMnB1:0 control the Output Compare pins (OCnA and OCnB respec-
tively) 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 bit are written to one, the OCnB output overrides the normal port functionality of the
I/O pin it is connected to. However, note that the Data Direction Register (DDR) bit correspond-
ing to the OCnA or OCnB pin must be set in order to enable the output driver.
When the OCnA or OCnB is connected to the pin, the function of the COMnx1:0 bits is depen-
dent of the WGMn3:0 bits setting. Table 53 shows the COMnx1:0 bit functionality when the
WGMn3:0 bits are set to a normal or a CTC mode (non-PWM).
Bit
7654
3
2
1
0
COM1A1
COM1A0
COM1B1
COM1B0
FOC1A
FOC1B
WGM11
WGM10
TCCR1A
Read/Write
R/W
R/W
R/W
R/W
W
W
R/W
R/W
Initial Value
0000
0
0
0
0
Bit
7654
3
2
1
0
COM3A1
COM3A0
COM3B1
COM3B0
FOC3A
FOC3B
WGM31
WGM30
TCCR3A
Read/Write
R/W
R/W
R/W
R/W
W
W
R/W
R/W
Initial Value
0000
0
0
0
0
Table 53. Compare Output Mode, non-PWM
COMnA1/
COMnB1
COMnA0/
COMnB0
Description
0
0
Normal port operation, OCnA/OCnB disconnected.
0
1
Toggle OCnA/OCnB on Compare Match.
1
0
Clear OCnA/OCnB on Compare Match (Set output to low level).
1
1
Set OCnA/OCnB on Compare Match (Set output to high level).



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