Peripherals Mr Arthur
Aims of Lesson 1 <ul><li>To go over the Computer Structure test </li></ul><ul><li>Begin Unit 3 – Peripherals </li></ul><ul...
Interface <ul><li>A piece of hardware that is positioned between the processor and peripheral </li></ul><ul><li>The interf...
Functions of the Interface <ul><li>Buffering </li></ul><ul><ul><li>A part of the interface where data is held temporarily ...
Other Interface Functions <ul><li>Voltage conversion   </li></ul><ul><ul><li>This is required if the peripheral uses a dif...
Computer Systems Question <ul><li>What is the total addressable memory if you have a 16 bit address bus and an 32 bit data...
Aims of Lesson 2 <ul><li>Last Lesson </li></ul><ul><li>Discuss the functions of an interface </li></ul><ul><ul><li>Bufferi...
Other Interface Functions <ul><li>Serial to Parallel Conversion </li></ul><ul><ul><li>Serial sends the bits for each chara...
Status Signals <ul><li>The purpose of a status signal is to determine whether or not a peripheral device is ready to commu...
Spoolers <ul><li>A spooler is a program which carries out a similar function to a buffer  </li></ul><ul><li>The spooler us...
Aims of Lesson 3 <ul><li>Last Lesson </li></ul><ul><li>Discuss the functions of an interface </li></ul><ul><ul><li>Bufferi...
Protocols <ul><li>An agreement or standard that is set up between the processor and the peripheral </li></ul><ul><li>Parit...
Interface Standards <ul><li>USB 1 = 12Mbps </li></ul><ul><li>USB 2 = 480Mbs </li></ul><ul><li>Firewire 800 </li></ul><ul><...
Solid State Storage <ul><li>A storage device that has no moving parts and uses Flash ROM </li></ul><ul><ul><li>Flash cards...
Aims of Lesson 4 <ul><li>So Far!! </li></ul><ul><li>Discuss the functions of an interface </li></ul><ul><ul><li>Buffering ...
Current Interface Trends <ul><li>Increasing speeds </li></ul><ul><ul><li>USB1 = 12Mbps </li></ul></ul><ul><ul><li>USB2 = 4...
Development Trends in Backing Storage <ul><ul><li>Blu-ray </li></ul></ul><ul><ul><ul><li>Used for storing high definition ...
Peripherals Revision Quiz <ul><li>What is an interface? </li></ul><ul><li>Give 3 functions of an interface </li></ul><ul><...
Peripherals Revision Quiz <ul><li>Give 3 advantages of using a solid state storage device over non solid state </li></ul><...
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Computer Systems Data Representation

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Computer Systems Data Representation

  1. 1. Peripherals Mr Arthur
  2. 2. Aims of Lesson 1 <ul><li>To go over the Computer Structure test </li></ul><ul><li>Begin Unit 3 – Peripherals </li></ul><ul><li>Discuss the functions of an interface </li></ul><ul><ul><li>Buffering </li></ul></ul><ul><ul><li>Data Format conversion </li></ul></ul><ul><ul><li>Voltage conversion </li></ul></ul>
  3. 3. Interface <ul><li>A piece of hardware that is positioned between the processor and peripheral </li></ul><ul><li>The interface allows the processor and peripherals to communicate and compensates for differences between the two, for example, speed </li></ul>INTERFACE
  4. 4. Functions of the Interface <ul><li>Buffering </li></ul><ul><ul><li>A part of the interface where data is held temporarily while in transit between the processor and peripheral </li></ul></ul><ul><ul><li>Processor sends print job to printer </li></ul></ul><ul><ul><li>Job stored temporarily in buffer </li></ul></ul><ul><ul><li>Processor get on with other tasks </li></ul></ul><ul><ul><li>Job is printed when printer is ready </li></ul></ul>
  5. 5. Other Interface Functions <ul><li>Voltage conversion </li></ul><ul><ul><li>This is required if the peripheral uses a different voltage from the standard 5V used by the processor </li></ul></ul><ul><li>Analogue to Digital Conversion </li></ul><ul><ul><li>Used to convert analogue signals like sound from a microphone into digital 1s and 0s </li></ul></ul>
  6. 6. Computer Systems Question <ul><li>What is the total addressable memory if you have a 16 bit address bus and an 32 bit data bus? </li></ul><ul><li>Give 1 advantage and 1 disadvantage of using ASCII over Unicode </li></ul><ul><li>I have an image of Bart Simpson with a bit depth of 16 bits. How many colours can I represent per pixel </li></ul><ul><li>How many bits are used to represent true colour </li></ul><ul><li>List the 3 steps in the Memory Read Operation </li></ul><ul><li>Name the 3 main types of RAM that can be found in a computer system </li></ul><ul><li>Name the 3 main buses connecting the processor to input and output </li></ul>
  7. 7. Aims of Lesson 2 <ul><li>Last Lesson </li></ul><ul><li>Discuss the functions of an interface </li></ul><ul><ul><li>Buffering </li></ul></ul><ul><ul><li>Data Format conversion </li></ul></ul><ul><ul><li>Voltage conversion </li></ul></ul><ul><li>Today’s Lesson </li></ul><ul><li>More functions of an interface </li></ul><ul><ul><li>Serial to Parallel conversion </li></ul></ul><ul><ul><li>Status Signals </li></ul></ul><ul><li>Spoolers </li></ul>
  8. 8. Other Interface Functions <ul><li>Serial to Parallel Conversion </li></ul><ul><ul><li>Serial sends the bits for each character one after the other </li></ul></ul><ul><ul><li>Parallel sends each character along separate lines sumultaneously .i.e data bus </li></ul></ul>0 1 0 1 1 SERIAL PARALLEL 1 1 1 0 0 SERIAL to PARALLEL conversion
  9. 9. Status Signals <ul><li>The purpose of a status signal is to determine whether or not a peripheral device is ready to communicate </li></ul><ul><li>Signals could include </li></ul><ul><ul><li>Insert paper </li></ul></ul><ul><ul><li>Printer busy </li></ul></ul><ul><ul><li>Toner low </li></ul></ul><ul><li>More printers also show status signals on a LCD panel on the printer </li></ul>
  10. 10. Spoolers <ul><li>A spooler is a program which carries out a similar function to a buffer </li></ul><ul><li>The spooler uses an area of the hard disk to temporarily store print jobs </li></ul><ul><li>The data is held on disk and transferred to the printer gradually </li></ul><ul><li>Adv </li></ul><ul><ul><li>Buffer is limited to a fixed size depending on RAM of printer </li></ul></ul><ul><ul><li>Spooler may be used in a LAN on a dedicated printer server </li></ul></ul>
  11. 11. Aims of Lesson 3 <ul><li>Last Lesson </li></ul><ul><li>Discuss the functions of an interface </li></ul><ul><ul><li>Buffering </li></ul></ul><ul><ul><li>Data Format conversion </li></ul></ul><ul><ul><li>Voltage conversion </li></ul></ul><ul><ul><li>Serial to Parallel conversion </li></ul></ul><ul><ul><li>Status Signals </li></ul></ul><ul><li>Spoolers </li></ul><ul><li>Today’s Lesson </li></ul><ul><ul><li>Protocols </li></ul></ul><ul><ul><li>Interface standards </li></ul></ul><ul><ul><li>Solid state storage </li></ul></ul><ul><ul><ul><li>Flash cards </li></ul></ul></ul><ul><ul><ul><li>USB flash memory </li></ul></ul></ul><ul><ul><li>Advantages of solid state </li></ul></ul>
  12. 12. Protocols <ul><li>An agreement or standard that is set up between the processor and the peripheral </li></ul><ul><li>Parity is an example of a protocol used for checking errors </li></ul><ul><ul><li>Even = adding a bit to each byte of data to make the number of 1s even </li></ul></ul><ul><ul><li>Odd = adding a bit to each byte of data to make the number of 1s odd </li></ul></ul>1 001 0011 0 001 0011
  13. 13. Interface Standards <ul><li>USB 1 = 12Mbps </li></ul><ul><li>USB 2 = 480Mbs </li></ul><ul><li>Firewire 800 </li></ul><ul><li>PCI (peripheral component interface) </li></ul>
  14. 14. Solid State Storage <ul><li>A storage device that has no moving parts and uses Flash ROM </li></ul><ul><ul><li>Flash cards </li></ul></ul><ul><ul><li>USB Flash memory </li></ul></ul><ul><ul><li>Advantages </li></ul></ul><ul><ul><ul><li>Physically small </li></ul></ul></ul><ul><ul><ul><li>Robust with no moving parts </li></ul></ul></ul><ul><ul><ul><li>Use less power </li></ul></ul></ul><ul><ul><ul><li>Range of capacities </li></ul></ul></ul>
  15. 15. Aims of Lesson 4 <ul><li>So Far!! </li></ul><ul><li>Discuss the functions of an interface </li></ul><ul><ul><li>Buffering </li></ul></ul><ul><ul><li>Data Format conversion </li></ul></ul><ul><ul><li>Voltage conversion </li></ul></ul><ul><ul><li>Serial to Parallel conversion </li></ul></ul><ul><ul><li>Status Signals </li></ul></ul><ul><li>Spoolers </li></ul><ul><li>Protocols </li></ul><ul><li>Interface standards </li></ul><ul><li>Solid state storage </li></ul><ul><ul><ul><li>Flash cards </li></ul></ul></ul><ul><ul><ul><li>USB flash memory </li></ul></ul></ul><ul><li>Advantages of solid state </li></ul><ul><li>Today’s Lesson </li></ul><ul><ul><li>Current Interface Trends </li></ul></ul><ul><ul><ul><li>Increasing Interface speeds </li></ul></ul></ul><ul><ul><ul><li>Wireless communication between peripherals and CPU </li></ul></ul></ul><ul><ul><li>Development Trends in Backing Storage </li></ul></ul><ul><ul><ul><li>Blu-ray </li></ul></ul></ul><ul><ul><ul><li>Holographic storage </li></ul></ul></ul><ul><ul><ul><li>Reduced Physical size </li></ul></ul></ul><ul><ul><ul><li>Lower storage cost </li></ul></ul></ul><ul><ul><li>Class Quiz to revise Peripherals </li></ul></ul>
  16. 16. Current Interface Trends <ul><li>Increasing speeds </li></ul><ul><ul><li>USB1 = 12Mbps </li></ul></ul><ul><ul><li>USB2 = 480Mbps </li></ul></ul><ul><li>Wireless Communication </li></ul><ul><ul><li>Using Bluetooth and Wifi radio waves to connect peripherals to the CPU </li></ul></ul>
  17. 17. Development Trends in Backing Storage <ul><ul><li>Blu-ray </li></ul></ul><ul><ul><ul><li>Used for storing high definition video </li></ul></ul></ul><ul><ul><ul><li>BD-ROM, BD-R and BD-RE </li></ul></ul></ul><ul><ul><ul><li>Laser beam in the drive is coloured blue, producing a narrower beam and is able to store more data </li></ul></ul></ul><ul><ul><li>Holographic storage </li></ul></ul><ul><ul><ul><li>Uses laser beams to record data through the full depth of the device rather than just the surface </li></ul></ul></ul><ul><ul><li>Reduced Physical size </li></ul></ul><ul><ul><li>Lower cost per unit of storage </li></ul></ul>
  18. 18. Peripherals Revision Quiz <ul><li>What is an interface? </li></ul><ul><li>Give 3 functions of an interface </li></ul><ul><li>What is the difference between buffering and spooling? </li></ul><ul><li>Give 1 advantage of spooling over buffering </li></ul><ul><li>What is a status signal? Give 1 example to reinforce your answer </li></ul><ul><li>Parity is an example of a protocol. What is even parity? </li></ul>
  19. 19. Peripherals Revision Quiz <ul><li>Give 3 advantages of using a solid state storage device over non solid state </li></ul><ul><li>Give 2 current interface trends </li></ul><ul><li>Give 3 trends in backing storage at the present time </li></ul>

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