Rainbow-electronics ATmega128L Instrukcja Użytkownika Pobierz pdf (Strona 130)

130

ATmega128(L)

2467B–09/01

Note: 1. The CTCn and PWMn1:0 bit definition names are obsolete. Use the WGMn2:0 definitions. However, the functionality and

location of these bits are compatible with previous versions of the timer.

Timer/Counter 1 Control

Timer/Counter 3 Control

• Bit 7 - ICNCn: Input Capture Noise Canceler

Setting this bit (to one) activates the input capture noise canceler. When the noise can-

celer is activated, the input from the Input Capture Pin (ICPn) is filtered. The filter

function requires four successive equal valued samples of the ICPn pin for changing its

output. The input capture is therefore delayed by four oscillator cycles when the noise

canceler is enabled.

Table 61. Waveform Generation Mode Bit Description

Mode WGMn3

WGMn2

(CTCn)

WGMn1

(PWMn1)

WGMn0

(PWMn0)

Timer/Counter Mode of

Operation

(1)

TOP

Update of

OCRnx at

TOVn Flag

Set on

0 0 0 0 0 Normal 0xFFFF Immediate MAX

1 0 0 0 1 PWM, Phase Correct, 8-bit 0x00FF TOP BOTTOM

2 0 0 1 0 PWM, Phase Correct, 9-bit 0x01FF TOP BOTTOM

3 0 0 1 1 PWM, Phase Correct, 10-bit 0x03FF TOP BOTTOM

4 0 1 0 0 CTC OCRnA Immediate MAX

5 0 1 0 1 Fast PWM, 8-bit 0x00FF TOP TOP

6 0 1 1 0 Fast PWM, 9-bit 0x01FF TOP TOP

7 0 1 1 1 Fast PWM, 10-bit 0x03FF TOP TOP

8 1 0 0 0 PWM, Phase and Frequency

Correct

ICRn BOTTOM BOTTOM

9 1 0 0 1 PWM, Phase and Frequency

Correct

OCRnA BOTTOM BOTTOM

10 1 0 1 0 PWM, Phase Correct ICRn TOP BOTTOM

11 1 0 1 1 PWM, Phase Correct OCRnA TOP BOTTOM

12 1 1 0 0 CTC ICRn Immediate MAX

13 1 1 0 1 (Reserved) –– –

14 1 1 1 0 Fast PWM ICRn TOP TOP

15 1 1 1 1 Fast PWM OCRnA TOP TOP

Bit 76543210

ICNC1 ICES1 – WGM13 WGM12 CS12 CS11 CS10 TCCR1B

Read/Write R/W R/W R R/W R/W R/W R/W R/W

Initial value00000000

Bit 76543210

ICNC3 ICES3 – WGM33 WGM32 CS32 CS31 CS30 TCCR3B

Read/Write R/W R/W R R/W R/W R/W R/W R/W

Initial value00000000

1 2 ... 125 126 127 128 129 130 131 132 133 134 135 ... 330 331

Komentarze do niniejszej Instrukcji

Brak uwag

Rainbow-electronics ATmega128L Instrukcja Użytkownika Strona 130

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Czujniki Rainbow-electronics ATmega128L