5.1 State TWO applications of microcontrollers in commercial devices - NSC Electrical Technology Digital - Question 5 - 2020 - Paper 1
Question 5
5.1 State TWO applications of microcontrollers in commercial devices.
5.2 Refer to FIGURE 5.2 below and answer the questions that follow.
5.2.1 Identify A and... show full transcript
Worked Solution & Example Answer:5.1 State TWO applications of microcontrollers in commercial devices - NSC Electrical Technology Digital - Question 5 - 2020 - Paper 1
Step 1
State TWO applications of microcontrollers in commercial devices.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Lighting in advertising and illumination of spaces.
Stock control systems.
Step 2
Identify A and B.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A = ROM
B = RAM
Step 3
Describe the function of the CPU.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The CPU is responsible for interpreting and executing the stored instructions from the ROM program.
Step 4
Describe the function of the input/output unit (I/O).
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The Input/Output unit enables the microcontroller to communicate with external devices through peripherals.
Step 5
List THREE advantages of microcontrollers over traditional discrete electronic components.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Microcontroller-based products can be smaller and cheaper.
They require fewer components, enhancing reliability.
Their flexibility allows features to be programmed into the chip.
Step 6
Describe the CPU register.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A CPU register, or processor register, is a small storage location that holds data temporarily and facilitates quick data access during instruction processing.
Step 7
List THREE special purpose registers.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Program Counter (PC)
Memory Address Register (MAR)
Current Instruction Register (CIR)
Step 8
Explain the function of the A/D converter.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
An A/D converter converts an analogue signal into a digital format that the CPU can interpret.
Step 9
Explain why an A/D converter is used with microcontrollers.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A/D converters are used in microcontrollers to detect analogue signals and convert them to digital format for processing.
Step 10
Label A.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A = Data bus
Step 11
Explain the function of the control bus.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The control bus is used mainly for issuing control instructions from the CPU to both memory and input/output devices.
Step 12
Explain the function of the address bus.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The address bus transmits the memory addresses from the memory and input/output ports to the CPU.
Step 13
State the characteristics of the serial peripheral interface (SPI).
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
SPI is a synchronous serial communication data link that operates in full duplex, allowing signals to carry data in both directions simultaneously.
Step 14
State the function of the serial peripheral interface (SPI).
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The function of the SPI is to enable data transfer between microcontrollers and small peripheral devices.
Step 15
State TWO applications of the serial peripheral interface (SPI).
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Digital signal processors
Shift Registers
Step 16
State the typical operating voltages for logic '1' and logic '0'.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Logic '1' = +200mV or more
Logic '0' = -200mV or less
Step 17
List THREE devices that can be used with the RS-485 interface.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Point of sale terminals
Metering instruments
CNC machines
Step 18
Label A, B and C.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A = Sender/Transmitter
B = Direction of data flow
C = Receiver
Step 19
Describe how data is transferred through the device.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Data is sent as one long stream of bits or as blocks of data. The receiving end counts and reconstructs the bits into bytes, requiring strict timing and synchronization between the sender and receiver using a common clock.
Step 20
Design a flow chart for a monostable device which has only ONE stable state.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
