Zusammenfassung der Ressource
Internal Functioning of a Computer
- Evolution of computer hardware
- Parts of the computer have become smaller
- Microprocessor (CPU)
- Most important Integrated Circuit
- Control Unit (CU)
- Organizes and controls the data and its flow
- Arithmetic Logic Unit (ALU)
- Executes arithmetic operations
- Interpretates and carries out
the basic instructions it recieves
- Instructions for the microprocessor:
- Complex Instruction Set Computer (CISC)
- Bigger capacity
- Reduced Instruction Set Computer (RISC)
- Faster
- Works by clock cycles
- Microprocessor brands
- AMD (American Micro Devices)
- Intel
- Motorola
- VIA Technologies
- Transmeta
- Works being serial or parallel
- Executes orders in a sequence,
changing processes in microseconds
- Executes orders simultaneously
- Performance of microprocessors
- Clock Speed
- Measured in hertz or Mega/Gigahertz
- Number of cycles (instructions
executed) performed in a second
- Cache Memory (main memory)
- Between RAM and the processor
- Provides the fastest acces to data
- Primary memory (deletes when the
computer is shut down)
- Stores the most frequently requested data
- First place where the microprocessor looks for info.
- Up to 3 levels of cache (8kb to 9Mb of memory)
- Size of the word
- Number of bits a microprocessor
can handle at the same time
- 32 or 64 bits, generally
- Compartment of the desktop
- Circuit Cards and Storing devices
- Power source
- "feeds" the computer so that it can work
- Transforms alternate current into direct current
- Fan (cools down the computer)
- Motherboard
- Provides space to connect all
devices to the computer
- Many of those devices can be replaced or repaired
- Memory
- Random Acces Memory (RAM)
- Primary memory (temporary)(ereases
when we turn off the computer)
- Fast but small memory (Works
in nanoseconds)
- When it cannot store everything, the order passes
directly to the Hard Drive, which is bigger but slower
- Up to 16 Gb of capacity
- Bigger RAM = faster computer
- Read Only Memory (ROM)
- Secondary memory (it doesn't erase)
- Greater capacity tan RAM, but slower
- Looks for information via revolutions
- Complementary Metal Oxid
Semiconductor (CMOS)
- Reading and writing memory
- Works with a battery that is charged
when the computer is on
- Registers time and date, along with
characteristics of installed hardware
- Sequence of memory: Ram, ROM
- Flash Memory
- Reading and Writing Memory
- Holds data when computer is off
- Most expensive one
- Mainly used in:
- Cellphones
- Digital cameras
- Printers
- Tablets
- Peripheal Devices
- Devices such as mouses, keyboards, etc. connected by ports
- Universal Serial Bus (USB)
- Compatibility with all computers
- Easy handling and info. saving
- Plug and Play (PnP)
- Recognized immediatly
- HDMI
- Connection to tv's, sengs 64 bits at a time
- Flow of data from component to component by cables = BUS
- Bus 1
- Connects processor to the memory
- Bus 2
- Connects processor to Peripheal devices
- Expansion cards
- They give the computer the ability to
control Input, Process and Output
- They fit in expansión slots
- They contain the ports we use to connect
external devices like mouses or keyboards