SWT4_CH02 - n Chapter 2Digital The Revolution Hardware...

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Succeeding with Technology 4th ed> Hardware Designed to Succeeding with Technology 4th ed> Hardware Designed to Please discontinue use of cell phone and turn off the ringer. n The Digital Hardware Designed to Meet the Need Chapter 2
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Succeeding with Technology 4th ed> Hardware Designed to n What does it mean to be digital? The Digital Revolution n Key Terms ¡ Binary number system ¡ Digital convergence
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Succeeding with Technology 4th ed> Hardware Designed to The Digital Revolution n Understand the importance of digitization …learn about how devices of all types use bytes. Digital Camera Digital Video (DVD) Digital PCS Cell Phone Digital Convergence The Digital Divide DIGITAL TV DIGITAL DIGITAL THEATERS RADIO DIGITAL What’s all the fuss about digital?!
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Succeeding with Technology 4th ed> Hardware Designed to The Bit (binary digit) n Bits are the 1’s and 0’s that allow us to represent, store, and manipulate data n They are the smallest unit of data in a digital electronics device Recall from chapter 1….
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Succeeding with Technology 4th ed> Hardware Designed to The Bit n Bits aren’t really 1’s and 0’s, they are devices that can be set to one of two states. ¡ A bit can be a capacitor that is electronically charged or not charged. ¡ A bit can be an area of metal particles on the surface of a disk that are either magnetically charged or not. ¡ A bit can be a microscopic spot on a highly reflective disk surface that
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Succeeding with Technology 4th ed> Hardware Designed to The Bit n How can a bit (an on-off switch) represent useful data and information? n Information can be assigned to the two states of the bit: ¡ On = ¡ Off = 1 and 0 are typically used to describe the state of a bit, but you could use anything; black/white, true/false, male/female, etc.
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Succeeding with Technology 4th ed> Hardware Designed to 00 = 01 = 10 = 11 = The Bit n How many units of information could be represented with 2 bits?
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Succeeding with Technology 4th ed> Hardware Designed to The Bit How many units of information could be stored using 3 bits? 000 = 001 = 010 = 011 = 100 = 101 = 110 = 111 =
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Succeeding with Technology 4th ed> Hardware Designed to n Bytes can represent any collection of items using a “look-up table” approach n ASCII is used to represent characters ASCII American Standard Code for Information Interchange http://en.wikipedia.org/wiki/ASCII
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The Value of Going Digital n Anything that can be expressed through words, numbers, sounds, pictures, and even scents can be digitized.
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SWT4_CH02 - n Chapter 2Digital The Revolution Hardware...

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