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 16-9.

PSCn0 & PSCn1 Basic Waveforms in Center Aligned Mode

OCRnRB

OCRnSB

OCRnSA

PSC Counter

On-Time 1

0

On-Time 0

On-Time 1

PSCOUTn0

PSCOUTn1

(AT90PWM2/3)

PSCOUTn1

(AT90PWM2B/3B)

Dead-Time

PSC Cycle

Dead-Time

On-Time 0 = 2 * OCRnSAH/L * 1/Fclkpsc

On-Time 1 = 2 * (OCRnRBH/L - OCRnSBH/L + 1) * 1/Fclkpsc

Dead-Time = (OCRnSBH/L - OCRnSAH/L) * 1/Fclkpsc

PSC Cycle = 2 * (OCRnRBH/L + 1) * 1/Fclkpsc

Note: Minimal value for PSC Cycle = 2 * 1/Fclkpsc

OCRnRAH/L is not used to control PSC Output waveform timing. Nevertheless, it can be useful

to adjust ADC synchronization (See “Analog Synchronization” on page 159.).

Figure 16-10. Run and Stop Mechanism in Centered Mode

OCRnRB

OCRnSB

OCRnSA

PSC Counter

0

Run

PSCOUTn0

PSCOUTn1

(AT90PWM2/3)

PSCOUTn1

(AT90PWM2B/3B)

Note: See “PSC 0 Control Register – PCTL0” on page 166.(or PCTL1 or PCTL2)

4317K–AVR–03/2013

140

Share Link: