13636760
Description
Flashcards by Steven Pearson, updated more than 1 year ago
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Created by Steven Pearson
over 6 years ago
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| Question | Answer |
| where is the microcontroller | its in the IC, which only has the CPU inside |
| draw the structure of a microcomputer/schematic arrangement | |
| what is a micro controller | its a small and low cost computer for specific tasks, eg ROM can be found in micro controllers also known as computer-on-a-chip excellent when low power and cost is required |
| draw the internal architecture of a microcontroller | |
| what are the advantages and disadvantages of micro-controllers? | |
| what are the two design models found in microcontrollers? | Harvard Architecture (RISC) Princeton architecture (CISC) |
| advantages/ disadvantages of harvard? | |
| what is the differences between CISC and RISC? | |
| what is an interrupt? | A signal that stops the current program forcing it to execute another program immediately |
| draw the classification of interrupts? | |
| Define polling interrupt what are the drawbacks? | each device is asked has data to transfer, eg burglar alarm it is continuously using processor time so is inefficient. |
| define interrupt driven | Allows the device to interrupt the task being carried out by the controller. it performs the required task and returns to what it was doing once complete. eg time critical applications, or phone conversation |
| what are the 4 interrupt sources of a PIC16FXXX | 1) writing data to EEPROM 2)TMRO by timer overflow 3) alteration of RB4-& 4) external interrupt from RBO/INT |
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