1 / 18

Lecture 3

Lecture 3. Storage units , output , output units. Storage units. used to store data at the request of the user , the units do not lose their contents when you turn off the device or power Outages. Main.

nayef
Download Presentation

Lecture 3

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lecture 3 Storage units , output ,output units

  2. Storage units • used to store data at the request of the user, the units do not lose their contents when you turn off the device or power Outages

  3. Main • Consists of several hard disk drives and this explains its ability to absorb a large amount of data. • storage capacity of up to more than 400 GBYTE • HDD

  4. Main • Floppy disk consists of only one disk and this explains to absorb a small amount of data. • the maximum storage capacity is 1.44Mbyte. • FDD

  5. Main • CD consists of material reflecting the light، the data is stored by using lasers. • used for read-only and cannot add data to it only through a special device to write the so-called CDWriter. • storage capacity of up to 750MBYTE. • CDROM drive

  6. Secondary • Similar to the floppy disk in terms of shape and has a drive motor is similar to the floppy disk. • it is characterized by a capacity of storage medium. • ZIP Drive

  7. Secondary • small-sized storage units . • connected through the ports of USB . • capacity of up to more than 32MByte. • Flash memory

  8. Secondary • External drive the largest in terms of storage capacity, cost and size. • External HDD

  9. Input units Input unit Enter and deliver the data to be processed to the CPU . Ex: • Keyboard. • Mouse. • Scanner. • Bar code reader. • Joy stick

  10. output units Output units Directed by which the data have been processed when the user requested Ex: • Monitor . • Printer. • Speaker.

  11. input, output at the same time Touch screen Is a unit display data (text, images) and at the same time to receive orders and options by clicking on it by the finger or a special pen

  12. Units of measurement capacities in the computer • Represent the data within the computer using binary digital data(0,1). • BIT is one of the two cases (0,1)

  13. Units derived from BIT • Byte=8Bit • Kbyte=1024Byte • MByte=1024Kbyte • GByte= 1024MByte

  14. Units used to measure the capacity of storage media • Capacity is measured in bytes of storage media and Derivative

  15. Units of measure processor speed • Processor speed is measured through the unity of electrical frequency (Hz) and derivatives • 1MHZ= 1000HZ • 1GHZ=1000X1000HZ=1000MHZ

  16. The units measure the speed of the motherboard • Measured the speed of the motherboard through the unit Hz. • the speed of the so-called BUS

  17. Note When increasing the speed of the motherboard and processor and memory capacity of RAM and hard drive capacity increases the efficiency of the computer

More Related