5.1 State TWO uses of a microcontroller in industrial control devices - NSC Electrical Technology Digital - Question 5 - 2019 - Paper 1
Question 5
5.1 State TWO uses of a microcontroller in industrial control devices.
Microcontrollers are used in industrial control devices for:
- **Industrial instrumentation:*... show full transcript
Worked Solution & Example Answer:5.1 State TWO uses of a microcontroller in industrial control devices - NSC Electrical Technology Digital - Question 5 - 2019 - Paper 1
Step 1
State TWO uses of a microcontroller in industrial control devices.
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Answer
Microcontrollers are used in industrial control devices for:
Industrial instrumentation: They handle various sensors and instruments to monitor systems.
Monitoring: They can monitor environmental conditions for changes and trigger controls as necessary.
Step 2
State the basic function that random access memory (RAM) performs.
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The RAM stores all the data that is required to be processed by the CPU during the execution of programmes, allowing for temporary data storage and fast access.
Step 3
State the basic function of a read-only memory (ROM).
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The ROM contains information that is permanently required. It holds the programmes, operating systems, and data required by the system to be booted up when it is turned on.
Step 4
Draw the block diagram of a microcontroller, clearly indicating the THREE system buses.
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(Insert block diagram here)
Step 5
Define the term interface.
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An interface is a shared boundary across which two separate components of a computer system exchange information.
Step 6
Explain the function of a programme counter.
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A programme counter counts the number of instructions that have been executed, adding one each time.
Step 7
Explain the function of a memory address register (MAR).
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The MAR stores the address of the next instruction to be executed by the processor.
Step 8
State ONE type of communication protocol.
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Common types include RS 232 or RS 485.
Step 9
Define communication protocol.
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A communication protocol is a set of rules that allow two electronic devices to connect and exchange data.
Step 10
Illustrate the following data transfer methods with a block diagram: Serial.
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(Insert block diagram here)
Step 11
Illustrate the following data transfer methods with a block diagram: Parallel.
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(Insert block diagram here)
Step 12
Write out the acronym UART in full.
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UART stands for Universal Asynchronous Receiver Transmitter.
Step 13
Explain the function of the UART.
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This communication peripheral sends and receives data serially. It converts parallel data to a serial data string and vice versa through the RX/TX line.
Step 14
Explain the term flowchart.
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A flowchart is a pictorial version of an algorithm and illustrates the flow of a program.
Step 15
Define an algorithm.
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An algorithm is a precise set of procedures to be followed in order to solve a problem.
Step 16
Describe an instruction cycle.
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In the cycle, the CPU fetches a program instruction from its memory, decodes the instruction, considers all inputs and then executes that instruction.
Step 17
Study the following algorithm and draw a flow chart thereof:
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A bistable device has two stable states.
It is set by an input going high, where it stays until it is reset by a second input.
After resetting, the output returns to the low state.
