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Which MCU or DSC Should You Choose?
Microchip provides many devices that can be used in motor control applications.
PIC12F and PIC16F Microcontroller Family
The PIC12F and PIC16F product families have an 8-bit CPU
that can operate at speeds up to 8 MIPS. Device variants
in the PIC12F family have 8 pins, while PIC16F variants are
offered in 14-pin through 64-pin packages.
Some variants in the PIC16F family have one or more
Enhanced Capture Compare PWM Peripheral (ECCP)
modules. The ECCP module is optimized for controlling ?
bridge or H bridge motor drive circuits. It can also be used
to steer PWM control signals among 4 output pins for BLDC
motor commutation or stepper motor control. The PIC12F
and PIC16F device families have these features for low-cost
motor control applications:
■ Up to 8 MIPS execution speed
■ One or more Enhanced Capture Compare PWM (ECCP)
modules with dead time control
■ Comparator with input multiplexer
Microchip makes many families of MCUs and DSCs, including
8-, 16- and 32-bit solutions. All of these can be used in
motor control applications. However, some families contain
special motor control peripherals and features as described
below. With all of these families, the motor control designer
can choose the level of functionality and performance that is
required for the application.
PIC10F Microcontroller Family
The 6-pin products of the PIC10F family offer the motor
control designer an opportunity to use microcontrollers
in applications that have historically been void of such
devices. Whether it is cost or space constraints, PIC10F
microcontrollers address these concerns by providing a
pricing structure that makes them nearly disposable with
form factors that can easily be implemented into the most
space constrained designs. The ADC, comparator and timer
peripherals found in the PIC10F device family can be used
to provide a user interface for basic on/off control, speed
control and other intelligent motor functions. The PIC10F
features include:
■ Up to 2 MIPS execution speed
■ 2x3 DFN or 6-pin SOT-23 package
■ Internal oscillator
■ Comparator
■ 8-bit ADC
■ 8-bit or 10-bit ADC (up to 90 ksps)
■ Internal RC Oscillator
■ Internal 5V Shunt Regulator (on “HV” devices)
PIC18F Microcontroller Family
The PIC18F product family also has an 8-bit CPU and offers
extended performance over the PIC16F device family. The
PIC18F device family can operate at speeds up to 16 MIPS
and has a hardware multiplier for faster calculation of control
algorithms. There are variants in the PIC18F family with
specialized motor control peripherals, including a 3-phase
motor control PWM peripheral and a quadrature encoder
interface (QEI). Other PIC18F variants have the ECCP module
found on the PIC16F device family. Source code developed
for the PIC16F device family can be easily migrated to
the PIC18F family. Devices with the motor control PWM
module are well suited for variable speed 3-phase motor
applications, while devices with the ECCP module are useful
for brush DC and stepper motor applications. The PIC18F
family has these features useful for 8-bit motor control
applications:
■ Up to 16 MIPS execution speed with hardware multiplier
■ Motor Control PWM Module with up to 8 outputs
■ Motion Control Feedback Module for quadrature encoders
■ One or more Enhanced Capture Compare PWM (ECCP)
modules
■ 10-bit ADC with up to 200 ksps sample rate
■ Up to 3 internal comparators
www.microchip.com/motor
3
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相关PDF资料
AC300030
KIT ACOUSTIC ACCESSORY
ACM-16
CABLE MODULE FR3 16BIT 40-DIP
ACM-2X8
ACTIVE CABLE MODULE DUAL 8 BIT
ACM-8
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ACS9593EVB
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