ATMEGA169 ATMEL [ATMEL Corporation], ATMEGA169 Datasheet - Page 118

• Manufacturer Part Number: ATMEGA169
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

118
ATmega169/V
Table 57 shows the COM1x1:0 bit functionality when the WGM13:0 bits are set to the
phase correct or the phase and frequency correct, PWM mode.
Table 57. Compare Output Mode, Phase Correct and Phase and Frequency Correct
PWM
Note:
• Bit 1:0 – WGM11:0: Waveform Generation Mode
Combined with the WGM13:2 bits found in the TCCR1B Register, these bits control the
counting sequence of the counter, the source for maximum (TOP) counter value, and
what type of waveform generation to be used, see Table 58. Modes of operation sup-
ported by the Timer/Counter unit are: Normal mode (counter), Clear Timer on Compare
match (CTC) mode, and three types of Pulse Width Modulation (PWM) modes. (See
“Modes of Operation” on page 107.).
COM1A1/COM1B1
(1)
1. A special case occurs when OCR1A/OCR1B equals TOP and COM1A1/COM1B1 is
0
0
1
1
set. See “Phase Correct PWM Mode” on page 111. for more details.
COM1A0/COM1B0
0
1
0
1
Description
Normal port operation, OC1A/OC1B
disconnected.
WGM13:0 = 9 or 11: Toggle OC1A on Compare
Match, OC1B disconnected (normal port
operation). For all other WGM1 settings, normal
port operation, OC1A/OC1B disconnected.
Clear OC1A/OC1B on Compare Match when up-
counting. Set OC1A/OC1B on Compare Match
when downcounting.
Set OC1A/OC1B on Compare Match when up-
counting. Clear OC1A/OC1B on Compare Match
when downcounting.
2514P–AVR–07/06