Rainbow-electronics ATmega103L Bedienungsanleitung PDF herunterladen (Seite 44)

ATmega603/103

Figure 33. Timer/Counter1 Block Diagram

Timer/Counter1 can also be used as a 8, 9 or 10-bit Pulse With Modulator. In this mode the counter and the

OCR1A/OCR1B registers serve as a dual glitch-free stand-alone PWM with centered pulses. Refer to page 49 for a

detailed description on this function.

The Input Capture function of Timer/Counter1 provides a capture of the Timer/Counter1 contents to the Input Capture

are defined by the Timer/Counter1 Control Register - TCCR1B. In addition, the Analog Comparator can be set to trigger

the Input Capture. Refer to the paragraph, “The Analog Comparator”, for details on this. The ICP pin logic is shown

in Figure 34.

Figure 34. ICP Pin Schematic Diagram

8-BIT DATA BUS

T/C1 CONTROL

T/C1 INPUT CAPTURE REGISTER (ICR1)

16 BIT COMPARATOR

TIMER/COUNTER1 OUTPUT COMPARE REGISTER A

TIMER/COUNTER1 OUTPUT COMPARE REGISTER B

TIMER/COUNTER1 (TCNT1)

TIMER INT. FLAG

CONTROL

LOGIC

COM1A1

COM1B1

CS12

TOV1

OCF0

TOV0

OCF1A

OCF1B

ICF1

COM1A0

COM1B0

CS11

CTC1

PWM11

PWM10

ICES1

ICNC1

CS10

T/C1 COMPARE

MATCHA IRQ

T/C1 COMPARE

MATCHB IRQ

T/C1 INPUT

CAPTURE IRQ

T/C1 OVER-

FLOW IRQ

CAPTURE

TRIGGER

T/C CLOCK SOURCE

T/C CLEAR

UP/DOWN

TIMER INT. MASK

OCIE0

TOIE0

TOIE1

OCIE1A

OCIE1B

TICIE1

TOIE2

TOV2

OCIE2

OCF2

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 125 126

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