Podcast
Questions and Answers
What role have PCs played in the development of embedded systems?
What role have PCs played in the development of embedded systems?
- Controlling the functions of embedded systems
- Providing hardware and software for embedded systems (correct)
- Serving as end-user programmable devices
- Replacing microprocessors in embedded systems
What is the main purpose of an embedded system?
What is the main purpose of an embedded system?
- To control a function or range of functions (correct)
- To provide hardware and software for PCs
- To be easily programmed by end users
- To function as a PC
Which of the following is NOT a reason for the widespread use of microprocessors?
Which of the following is NOT a reason for the widespread use of microprocessors?
- Replacement for analogue circuits
- Protection of intellectual property
- End-user programmability (correct)
- Enhancement of mechanical performance
Why are microprocessors widely used in embedded systems?
Why are microprocessors widely used in embedded systems?
What key function do embedded systems perform?
What key function do embedded systems perform?
What is NOT an advantage of using microprocessors in embedded systems?
What is NOT an advantage of using microprocessors in embedded systems?
What is a common characteristic of embedded systems?
What is a common characteristic of embedded systems?
Which of the following is not a common design metric for optimizing embedded systems?
Which of the following is not a common design metric for optimizing embedded systems?
What is the purpose of NRE cost in optimizing embedded system design?
What is the purpose of NRE cost in optimizing embedded system design?
What does 'time-to-market' refer to in the context of optimizing embedded system design?
What does 'time-to-market' refer to in the context of optimizing embedded system design?
What is the potential drawback of improving one design metric in embedded systems?
What is the potential drawback of improving one design metric in embedded systems?
Which component is not typically found in an embedded system like a digital camera?
Which component is not typically found in an embedded system like a digital camera?
What is the average time-to-market constraint for an embedded system product?
What is the average time-to-market constraint for an embedded system product?
'Losses due to delayed market entry' graphically illustrates potential losses associated with:
'Losses due to delayed market entry' graphically illustrates potential losses associated with:
What does 'Maintainability' refer to as a design metric for embedded systems?
What does 'Maintainability' refer to as a design metric for embedded systems?
What is meant by 'Peak revenue' as shown in 'Losses due to delayed market entry' graph?
What is meant by 'Peak revenue' as shown in 'Losses due to delayed market entry' graph?
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Study Notes
- Microprocessors are used extensively in embedded systems.
- Embedded systems are microprocessor-based systems designed to perform specific functions without end-user programming.
- PCs have been a significant source of hardware and software for embedded systems.
- Reasons for the widespread use of microprocessors: replacement of discrete logic-based circuits, provision of functional and maintenance upgrades, improvement of mechanical performance, protection of intellectual property, and replacement of analogue circuits.
- Microprocessors consist of the processor, memory, peripherals, and software.
- Embedded systems are single-functioned, tightly-constrained, reactive, and real-time systems.
- An example of an embedded system is a digital camera, comprising of a CCD chip, CCD preprocessor, pixel coprocessor, D2A, A2D, JPEG codec, microcontroller, multiplier/accum, DMA controller, memory controller, display controller, and various interfaces.
- Designing embedded systems involves optimizing design metrics such as unit cost, NRE cost, size, and performance, among others.
- Common design metrics and their goals: unit cost (monetary cost of manufacturing each copy), NRE cost (one-time cost of designing), size (physical space requirement), and performance (execution time or throughput).
- Time-to-market is a critical design metric, aiming to develop the product to be sold to customers within a given time constraint.
- Delayed market entry can lead to significant financial losses.
- The simplified revenue model for a product assumes a product life of 2W, with peak revenue occurring at the beginning of the market window, and average time-to-market being 8 months.
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