By Fred Eady View In Digital Edition
No matter how powerful a microcontroller may claim to be, a microcontroller by itself cannot do everything in a real-world, I/O-oriented embedded system. For instance, I don’t know of any microcontroller that can directly drive a one ampere resistive or inductive load directly from one of its I/O pins. That means if you’re working on putting together a microcontroller-based system that will interface to motors and relays, a great deal of your design time will be expended on the I/O interface...
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