0

Is a device controller also a microcontroller with more functions? I know device controller has input and output ports for external device communication but how about communication between device controller and cpu?

  • does stackoverflow.com/questions/3698158/… help? It's above my paygrade... – Tetsujin Oct 29 '14 at 18:12
  • Device controller is a concept that goes way back in computer hardware history, before any microcontrollers were available. Device controller could be all HW logic circuits, or (the typical modern version) a custom processor with RAM, (EEP)ROM (or flash), and firmware. A microcontroller is a processor-plus-periperals IC that can be used for almost any application. A microcontroller is often the guts of an embedded system. – sawdust Oct 29 '14 at 19:42
0

The Device Controller receives the data from a connected device and stores it temporarily in some special purpose registers (i.e. local buffer) inside the controller. Then it communicates the data with a Device Driver . For each device controller there is an equivalent device driver which is the standard interface through which the device controller communicates with the Operating Systems through Interrupts. Device controller is a hardware whereas device driver is a software. The controller's job is to convert the serial bit stream to block bytes and perform any error correction necessary.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.