OM11027 NXP Semiconductors, OM11027 Datasheet - Page 46
OM11027
Manufacturer Part Number
OM11027
Description
BOARD EVAL LPC2939
Manufacturer
NXP Semiconductors
Type
MCUr
Datasheet
1.OM11027.pdf
(99 pages)
Specifications of OM11027
Contents
Board
For Use With/related Products
LPC2939
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
568-4787
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NXP Semiconductors
LPC2939_3
Product data sheet
6.15.5.1 Functional description
The ability to provide flexible waveforms allows PWM blocks to be used in multiple
applications; e.g. dimmer/lamp control and fan control. Pulse-width modulation is the
preferred method for regulating power since no additional heat is generated, and it is
energy-efficient when compared with linear-regulating voltage control networks.
The PWM delivers the waveforms/pulses of the desired duty cycles and cycle periods. A
very basic application of these pulses can be in controlling the amount of power
transferred to a load. Since the duty cycle of the pulses can be controlled, the desired
amount of power can be transferred for a controlled duration. Two examples of such
applications are:
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Six pulse-width modulated output signals
Double edge features (rising and falling edges programmed individually)
Optional interrupt generation on match (each edge)
Different operation modes: continuous or run-once
16-bit PWM counter and 16-bit prescale counter allow a large range of PWM periods
A protective mode (TRAP) holding the output in a software-controllable state and with
optional interrupt generation on a trap event
Three capture registers and capture trigger pins with optional interrupt generation on
a capture event
Interrupt generation on match event, capture event, PWM counter overflow or trap
event
A burst mode mixing the external carrier signal with internally generated PWM
Programmable sync-delay output to trigger other PWM modules (master/slave
behavior)
Dimmer controller: The flexibility of providing waves of a desired duty cycle and cycle
period allows the PWM to control the amount of power to be transferred to the load.
The PWM functions as a dimmer controller in this application.
Motor controller: The PWM provides multi-phase outputs, and these outputs can be
controlled to have a certain pattern sequence. In this way the force/torque of the
motor can be adjusted as desired. This makes the PWM function as a motor drive.
All information provided in this document is subject to legal disclaimers.
Rev. 03 — 7 April 2010
ARM9 microcontroller with CAN, LIN, and USB
LPC2939
© NXP B.V. 2010. All rights reserved.
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