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ENGR 202 - Instrumentation and Control > Embedded Systems > Flashcards

Embedded Systems Flashcards

1
Q

What is an external system?

A

A system where the computer control is added on to the engineering system.

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2
Q

What is an embedded system?

A

A system where the computer control is built into the engineering system.

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3
Q

What are the pros of an external system?

A

Extensive flexibility with the scope of the control, particularly the speed and memory.

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4
Q

What are the cons of an external system (4)?

A
  • Expensive
  • Messy
  • Bulky
  • Not suited for mass production
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5
Q

What are the pros of an embedded system (6)?

A
  • Cost-effective
  • Small, low-power
  • Reliable
  • Robust
  • Mass-producible
  • Easily-serviceable
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6
Q

What are the cons of an embedded system (3)?

A
  • Constraints on memory capacity and speed
  • Programming can be more complex
  • There can often be specific electronic interfacing requirements
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7
Q

What are embedded systems?

A

Anything that uses a microprocessor but isn’t a computer.

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8
Q

What is a microprocessor?

A

Implemented single-chip central processing units. They take instructions from the memory and follow those instructions to process the binary running through them.

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9
Q

What are Microcontrollers?

A

Tiny computer-based processing units with little memory. They contain a microprocessor.

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10
Q

What is a bit?

A

A 1 or a 0

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11
Q

What is a byte?

A

8 bits

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12
Q

What is a nibble?

A

4 bits

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13
Q

What is a word?

A

16 bits

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14
Q

Why do microcontrollers use hexadecimal (2)?

A
  • Binary is cumbersome

- Decimal becomes obscure for some addressing purposes

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15
Q

What is RAM (4)?

A
  • Read And write Memory
  • Volatile: Information lost when power is removed)
  • Read means the processor can store information
  • Write means the processor can receive information from the memory
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16
Q

What is ROM (2)?

A
  • Read Only Memory

- Non volatile but can be erasable

17
Q

What is PROM?

A

Programmable Read Only Memory

18
Q

What is EROM?

A

Erasable Read Only Memory

19
Q

What is EEPROM?

A

Electronically Erasable Programmable Read Only Memory

20
Q

What are the 4 types of BUS in a microprocessor based system?

A
  • Power
  • Control
  • Address
  • Data
21
Q

What is the Control Bus (4)?

A
  • Consists of 4 -10 parallel signal lines
  • CPU sends signals to memory and I/O ports
  • Examples: Memory read/Memory write/I/O read/I/O write
  • Bidirectional
22
Q

What is the Address Bus (3)?

A
  • Consists of 16,20,24, or 32 parallel signals
  • Contains the location of the memory to read/write
  • Unidirectional
23
Q

What is the Data Bus (3)?

A
  • Consists of 8, 16, or 32 parallel signal lines
  • Only one device at a time can have it’ s outputs enabled
  • Bidirectional

ENGR 202 - Instrumentation and Control (1 decks)

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