AT90PWM2B-16SU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT90PWM2B-16SU

8-bit Atmel Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

AT90PWM2/3/2B/3B

Figure 14-9. Timer/Counter Timing Diagram, with Prescaler (fclk_I/O/8)

clkI/O

clkTn

(clkI/O/8)

TCNTn

MAX - 1

MAX

BOTTOM

TOVn

BOTTOM + 1

Figure 14-10 shows the setting of OCF0B in all modes and OCF0A in all modes except CTC

mode and PWM mode, where OCR0A is TOP.

Figure 14-10. Timer/Counter Timing Diagram, Setting of OCF0x, with Prescaler (fclk_I/O/8)

clkI/O

clkTn

(clkI/O/8)

TCNTn

OCRnx - 1

OCRnx

OCRnx + 1

OCRnx + 2

OCRnx

OCRnx Value

OCFnx

Figure 14-11 shows the setting of OCF0A and the clearing of TCNT0 in CTC mode and fast

PWM mode where OCR0A is TOP.

Figure 14-11. Timer/Counter Timing Diagram, Clear Timer on Compare Match mode, with Pres-

caler (fclk_I/O/8)

clkI/O

clkTn

(clkI/O/8)

TCNTn

(CTC)

OCRnx

TOP - 1

TOP

TOP

BOTTOM

BOTTOM + 1

OCFnx

14.8 8-bit Timer/Counter Register Description

14.8.1 Timer/Counter Control Register A – TCCR0A

Bit

7

6

5

4

3

COM0A1 COM0A0 COM0B1 COM0B0

–

Read/Write

R/W

R/W

R/W

R/W

R

Initial Value

0

0

0

0

0

4317K–AVR–03/2013

2

1

0

–

WGM01 WGM00 TCCR0A

R

R/W

R/W

0

0

0

97

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