ATMEGA8L ATMEL [ATMEL Corporation], ATMEGA8L Datasheet - Page 97

• Manufacturer Part Number: ATMEGA8L
• Description: 8-bit AVR with 8K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Table 39. Waveform Generation Mode Bit Description
Note:
2486M–AVR–12/03
Mode
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
1. The CTC1 and PWM11:0 bit definition names are obsolete. Use the
WGM13
location of these bits are compatible with previous versions of the timer.
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
WGM12
(CTC1)
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
(PWM11)
WGM11
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
what type of waveform generation to be used, see Table 39. 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 86.)
(PWM10)
WGM10
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Timer/Counter Mode of
Operation
Normal
PWM, Phase Correct, 8-bit
PWM, Phase Correct, 9-bit
PWM, Phase Correct, 10-bit
CTC
Fast PWM, 8-bit
Fast PWM, 9-bit
Fast PWM, 10-bit
PWM, Phase and Frequency
Correct
PWM, Phase and Frequency
Correct
PWM, Phase Correct
PWM, Phase Correct
CTC
(Reserved)
Fast PWM
Fast PWM
(1)
WGM
12:0 definitions. However, the functionality and
TOP
0xFFFF
0x00FF
0x01FF
0x03FF
OCR1A
0x00FF
0x01FF
0x03FF
ICR1
OCR1A
ICR1
OCR1A
ICR1
–
ICR1
OCR1A
Update of
OCR1
Immediate
TOP
TOP
TOP
Immediate
TOP
TOP
TOP
BOTTOM
BOTTOM
TOP
TOP
Immediate
–
TOP
TOP
ATmega8(L)
x
TOV1 Flag
Set on
MAX
BOTTOM
BOTTOM
BOTTOM
MAX
TOP
TOP
TOP
BOTTOM
BOTTOM
BOTTOM
BOTTOM
MAX
–
TOP
TOP
97