at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 713

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

38. Pulse Width Modulation (PWM) Controller
38.1
38.2
Figure 38-1. Pulse Width Modulation Controller Block Diagram
6249D–ATARM–20-Dec-07
Description
Block Diagram
PMC
The PWM macrocell controls several channels independently. Each channel controls one
square output waveform. Characteristics of the output waveform such as period, duty-cycle and
polarity are configurable through the user interface. Each channel selects and uses one of the
clocks provided by the clock generator. The clock generator provides several clocks resulting
from the division of the PWM macrocell master clock.
All PWM macrocell accesses are made through APB mapped registers.
Channels can be synchronized, to generate non overlapped waveforms. All channels integrate a
double buffering system in order to prevent an unexpected output waveform while modifying the
period or the duty-cycle.
MCK
Clock Generator
Channel
Selector
Channel
Selector
PWMx
PWM0
Clock
Clock
APB Interface
Controller
PWM
Duty Cycle
Duty Cycle
Counter
Counter
Update
Update
APB
Period
Period
AT91SAM9263 Preliminary
Comparator
Comparator
Interrupt Generator
PIO
AIC
PWMx
PWMx
PWM0
PWM0
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