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Questions and Answers
Which of the following is NOT a characteristic of embedded systems?
Which of the following is NOT a characteristic of embedded systems?
- They have unlimited resources (correct)
- They are smaller in size compared to desktop systems
- They are used for a fixed purpose
- They use ROM instead of hard disks for storing programs
What type of memory is mostly used in embedded systems?
What type of memory is mostly used in embedded systems?
- RAM
- ROM (correct)
- Flash memory
- Hard disk
Why must embedded systems be failure-tolerant?
Why must embedded systems be failure-tolerant?
- To improve efficiency
- To increase memory capacity
- To ensure high reliability (correct)
- To reduce power consumption
What types of input and output devices are commonly used in embedded systems?
What types of input and output devices are commonly used in embedded systems?
Why must embedded systems consume low power relative to the host system?
Why must embedded systems consume low power relative to the host system?
What hardware features are built into the processor to perform tasks with external devices?
What hardware features are built into the processor to perform tasks with external devices?
What are interrupts used for in embedded systems?
What are interrupts used for in embedded systems?
What do timers provide in embedded systems?
What do timers provide in embedded systems?
What is DMA in embedded systems?
What is DMA in embedded systems?
Why is power management crucial for embedded systems?
Why is power management crucial for embedded systems?
How does processor hardware affect power consumption in embedded systems?
How does processor hardware affect power consumption in embedded systems?
What has led to an increased use of embedded systems in everyday life?
What has led to an increased use of embedded systems in everyday life?
Which of the following is NOT a characteristic of embedded systems?
Which of the following is NOT a characteristic of embedded systems?
What type of memory is mostly used in embedded systems?
What type of memory is mostly used in embedded systems?
Why must embedded systems be failure-tolerant?
Why must embedded systems be failure-tolerant?
What types of input and output devices are commonly used in embedded systems?
What types of input and output devices are commonly used in embedded systems?
Why must embedded systems consume low power relative to the host system?
Why must embedded systems consume low power relative to the host system?
What hardware features are built into the processor to perform tasks with external devices?
What hardware features are built into the processor to perform tasks with external devices?
What are interrupts used for in embedded systems?
What are interrupts used for in embedded systems?
What do timers provide in embedded systems?
What do timers provide in embedded systems?
What is DMA in embedded systems?
What is DMA in embedded systems?
Why is power management crucial for embedded systems?
Why is power management crucial for embedded systems?
How does processor hardware affect power consumption in embedded systems?
How does processor hardware affect power consumption in embedded systems?
What has led to an increased use of embedded systems in everyday life?
What has led to an increased use of embedded systems in everyday life?
Which of the following is NOT a characteristic of embedded systems?
Which of the following is NOT a characteristic of embedded systems?
What type of memory is mostly used in embedded systems?
What type of memory is mostly used in embedded systems?
What is one of the hardware features built into the processor of embedded systems?
What is one of the hardware features built into the processor of embedded systems?
What is the purpose of interrupts in embedded systems?
What is the purpose of interrupts in embedded systems?
What is the purpose of timers in embedded systems?
What is the purpose of timers in embedded systems?
What is DMA in embedded systems?
What is DMA in embedded systems?
Why is power management crucial for embedded systems?
Why is power management crucial for embedded systems?
What is the effect of lower clock frequency on power consumption in embedded systems?
What is the effect of lower clock frequency on power consumption in embedded systems?
What is the effect of higher voltage on processor speed in embedded systems?
What is the effect of higher voltage on processor speed in embedded systems?
What has led to an increased use of embedded systems in everyday life?
What has led to an increased use of embedded systems in everyday life?
What type of input and output devices are used in embedded systems?
What type of input and output devices are used in embedded systems?
What is the purpose of real-time control in embedded systems?
What is the purpose of real-time control in embedded systems?
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Study Notes
Characteristics and Hardware Features of Embedded Systems
- Embedded systems are used for a fixed purpose and are smaller in size compared to desktop systems.
- They have limited resources, with the amount of memory mostly being in terms of RAM, and they use ROM instead of hard disks for storing programs.
- Embedded systems must be failure-tolerant and have real-time control, with guaranteed response time and high reliability.
- Simple input and output devices, such as switches, sensors, and small keypads, are used in embedded systems.
- Embedded systems must consume low power relative to the host system and be low-cost to avoid adding to the total cost.
- Hardware features such as interrupts, timers, and direct memory access (DMA) are built into the processor to perform tasks with external devices.
- Interrupts are used to improve the efficiency of the processor in waiting for input and output from slower devices.
- Timers provide a source of precise time events to control external devices in a precise manner.
- DMA is a method for peripheral devices to transfer data to and from memory without data going through the processor.
- Power management is crucial for embedded systems, with methods such as using low-power modes, optimizing program design, improving power supply, and replacing batteries with energy harvesting.
- Processor hardware affects power consumption, with lower clock frequency reducing power consumption, and higher voltage needed for operation at higher speeds.
- The Internet of Things (IoT) has led to an increased use of embedded systems in everyday life, with devices collecting personal information and requiring power-saving designs.
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