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Ch.11 The System Unit of a Computer System - Coggle Diagram
Ch.11 The System Unit of a Computer System
Components of Computer
Power Supply
provide electricity(AC to DC)
Storage Device
Ram
Rom
Motherboard
contains circuity
Provide sockets for
CPU
memory chips
expansion cards
connect the parts together
Peripherals
Input
Monitor
Output
Printer
connected hardware devices
Storage
USB flash drive
communication
network switch
System Bus
About
Size of a Bus = Bus Width
determines the number of bits of data that can be transmitted at same time
Transmit data between CPU and other components
Bus Types
Address Bus
Control Bus
Data Bus
CPU
About
determines overall performance
Executes instructions
communicates through bus lines
processes data
Central Processing Unit
ALU
Registers
Control Register
Status Register
General Purpose Register
CU
CPU Speed
Clock Rate
Speed of CPU
MHz or GHz
Word Length
handle at one time
number of bits of data
instructions
longer can handle more complicated instructions
Development
More cores
Higher clock rate
Machine Cycle
Process of executing an instruction
Sub-cycle
Decode
Execute
Fetch
Interupt
saved current process
served interupt
If have interupt
resume operation
Memory
About
Access CPU without other I/O
store instructions or data
Installed on MB
ROM
store permanent information
contain bootstrap program
Non-Volatile
EPROM
EEPROM
RAM
Temporarily hold the data
Volatile
High Access Time
DRAM
Main memory
SRAM
CPU cache
Cache Memory
Store data and instruction recently used
integrated or resided close to CPU
High-speed Memory
Sam Ching 4C17