1.1 system architecture V2

processor
1. ''brains of the computer system''
2. it processes data
3. executes instructions
4. processor speed is measured in herts
5. fetch,decode,execute
MHz
1. 1MHz executes 1 M instructions per second
2. Used to measure processor speed
GHz
1. 1GHz executes 1B instructions per second
2. used to measure processor speed
embedded system
1. often known as firmware
2. ususally for special tasks
3. don't usually have an OS
4. essentially a computer in another device
clock speed
1. measured in Hertz
2. how many clock cycles a CPU can do per second
3. 1GHz can do 1,000,000,000 clock cycles per second
cache
1. very fast
2. takes up a small amount of memory on processor chip
3. works as an intermediary between the processor and the main memory
4. as programs are executing the cache holds commonly used instructions
core
1. each core executes instructions independently
2. processors can be multi core meaning more work gets done in the same amount of time
Hertz
1. used to measure processor speed
instruction
1. a single operation of a processor
execute
1. carry out
Register
1. A component for holding short term memory
CPU
1. Central Processing Unit
2. cache
3. ALU
4. Control unit
Arithmetic Logic Unit
1. Carries out arithmetic and logic problems
2. typically has access to input and output to the processor controller,main memory (RAM),and I/O devices
Busses
1. Inputs and outputs flow along a bus
2. Address bus,Data bus,or Local bus
3. Data connection between two or more devices connected to the computer
Control unit
1. Tells memory,ALU,and I/O devices how to respond to an instruction

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1.1 system architecture V2

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