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Yuou can use HW or SW PWM to control motor speed.intefacing PIC with a MOSFET.
Instead, interfacing PIC with an H-bridge you can control speed and also motor directions and its braking. If you want to control posision you can use some feedback devices.
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Don't know what your application is but if you Need to use a DC motor and know its speed and direction it can be done. See how a H bridge is working and you can build one yourself using MOSFET's its cheaper than those special IC's you have in the market. Use for your application: Si1912EDH for the low part of the bridge and Si1913EDH for the top part of the H bridge. I used it myself in an application and works perfect. Use two ADC inputs on your pic and connect them one at both ends of your motor in the H bridge. With this you can seasure EMF from the motor if your bridge is completely switched off. Check Microchip Application note for this. The bridge can be controlled by 4 I/O lines of your PIC and if you don't need the speed of the motor you can setup your H-Bridge to work with just 2 I/O lines as I did. Measuring EMF from the DC motor will give you rotation speed (see Application Note Microchip)
Direction can be controlled by H bridge.
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