ATmega88PA Automotive Atmel Corporation, ATmega88PA Automotive Datasheet - Page 115

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ATmega88PA Automotive

Manufacturer Part Number
ATmega88PA Automotive
Description
Manufacturer
Atmel Corporation
Table 14-4.
Note:
14.11.2
7701E–AVR–02/11
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 WGM12:0 definitions. However, the functionality and
WGM13
TCCR1B – Timer/Counter1 Control Register B
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
Waveform Generation Mode Bit Description
WGM12
(CTC1)
0
0
0
0
0
0
1
1
1
1
0
0
1
1
1
1
• Bit 7 – ICNC1: Input Capture Noise Canceller
Setting this bit (to one) activates the input capture noise canceller. When the noise canceller is
activated, the input from the input capture pin (ICP1) is filtered. The filter function requires four
successive equal valued samples of the ICP1 pin for changing its output. The input capture is,
therefore, delayed by four oscillator cycles when the noise canceller is enabled.
• Bit 6 – ICES1: Input Capture Edge Select
This bit selects which edge on the input capture pin (ICP1) that is used to trigger a capture
event. When the ICES1 bit is written to logical zero, a falling (negative) edge is used as trigger,
and when the ICES1 bit is written to logical one, a rising (positive) edge will trigger the capture.
When a capture is triggered according to the ICES1 setting, the counter value is copied into
the input capture register (ICR1). The event will also set the input capture flag (ICF1), and this
can be used to cause an input capture interrupt, if this interrupt is enabled.
Bit
0x2E (0x4E)
Read/Write
Initial Value
(PWM11)
WGM11
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
ICNC1
R/W
(PWM10)
WGM10
7
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
ICES1
R/W
6
0
Atmel ATtiny24/44/84 [Preliminary]
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)
R
5
0
WGM13
R/W
4
0
WGM12
R/W
3
0
TOP
0xFFFF
0x00FF
0x01FF
0x03FF
OCR1A
0x00FF
0x01FF
0x03FF
ICR1
OCR1A
ICR1
OCR1A
ICR1
ICR1
OCR1A
CS12
R/W
2
0
CS11
Update of
OCR1
Immediate
TOP
TOP
TOP
Immediate
BOTTOM
BOTTOM
BOTTOM
BOTTOM
BOTTOM
TOP
TOP
Immediate
BOTTOM
BOTTOM
R/W
1
0
x
at
CS10
R/W
0
0
TOV1 Flag
Set on
MAX
BOTTOM
BOTTOM
BOTTOM
MAX
TOP
TOP
TOP
BOTTOM
BOTTOM
BOTTOM
BOTTOM
MAX
TOP
TOP
TCCR1B
115

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