ATMEGA2561V ATMEL [ATMEL Corporation], ATMEGA2561V Datasheet - Page 161

• Manufacturer Part Number: ATMEGA2561V
• Description: 8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

2549K–AVR–01/07
.
Table 83. Compare Output Mode, non-PWM
Table 84 shows the COMnx1:0 bit functionality when the WGMn3:0 bits are set to the
fast PWM mode.
Table 84. Compare Output Mode, Fast PWM
Note:
Table 85 shows the COMnx1:0 bit functionality when the WGMn3:0 bits are set to the
phase correct and frequency correct PWM mode.
Table 85. Compare Output Mode, Phase Correct and Phase and Frequency Correct
PWM
Note:
COMnA1
COMnB1
COMnC1
COMnA1
COMnB1
COMnC1
COMnA1
COMnB1
COMnC1
0
0
1
1
0
0
1
1
0
0
1
1
A
COMnA1/COMnB1/COMnC1 is set. In this case the compare match is ignored, but the
set or clear is done at BOTTOM. See “Fast PWM Mode” on page 151. for more details.
A
COMnA1/COMnB1//COMnC1 is set. See “Phase Correct PWM Mode” on page 153. for
more details.
special
special
COMnA0
COMnB0
COMnC0
COMnA0
COMnB0
COMnC0
COMnA0
COMnB0
COMnC0
0
1
0
1
0
1
0
1
0
1
0
1
case
case
ATmega640/1280/1281/2560/2561
Description
Normal port operation, OCnA/OCnB/OCnC disconnected.
Toggle OCnA/OCnB/OCnC on compare match.
Clear OCnA/OCnB/OCnC on compare match (set output to low level).
Set OCnA/OCnB/OCnC on compare match (set output to high level).
Description
Normal port operation, OCnA/OCnB/OCnC disconnected.
WGM13:0 = 14 or 15: Toggle OC1A on Compare Match, OC1B and
OC1C disconnected (normal port operation). For all other WGM1
settings, normal port operation, OC1A/OC1B/OC1C disconnected.
Clear OCnA/OCnB/OCnC on compare match, set
OCnA/OCnB/OCnC at BOTTOM (non-inverting mode).
Set OCnA/OCnB/OCnC on compare match, clear
OCnA/OCnB/OCnC at BOTTOM (inverting mode).
Description
Normal port operation, OCnA/OCnB/OCnC disconnected.
WGM13:0 =9 or 11: Toggle OC1A on Compare Match, OC1B and
OC1C disconnected (normal port operation). For all other WGM1
settings, normal port operation, OC1A/OC1B/OC1C disconnected.
Clear OCnA/OCnB/OCnC on compare match when up-counting. Set
OCnA/OCnB/OCnC on compare match when downcounting.
Set OCnA/OCnB/OCnC on compare match when up-counting. Clear
OCnA/OCnB/OCnC on compare match when downcounting.
occurs
occurs
when
when
OCRnA/OCRnB/OCRnC
OCRnA/OCRnB/OCRnC
equals
equals
TOP
TOP
161
and
and