System Clock clock speed Word Length Bus Width

System Clock, clock speed, Word Length & Bus Width

System Clock Every computer has its own systems clock. A quartz controlled oscillator that supplies a timing signal at a fixed rate. It could be likened to someone clicking their fingers, everything happens at this rate. System Clock, clock speed, Word Length & Bus Width

System Clock Instructions and data are processed in time to the system clock. Instruction Data 1 Hz 2 Hz 3 Hz 4 Hz 5 Hz The data and instructions are fetched, decoded and executed in time with the system clock. A typical clock speed or clock frequency: 2. 4 GHz (2400, 000 cycles per second) System Clock, clock speed, Word Length & Bus Width Clock speed of the processor

System Clock Instructions and data are processed in time to the system clock. Instruction Data 1 Hz 2 Hz 3 Hz 4 Hz 5 Hz Memory 2. 4 GHz Processor (2400, 000 cycles per second) Internal Bus System Clock, clock speed, Word Length & Bus Width When transferring data or instructions between the processor and main memory, sometimes the internal bus speed slows a computer down.

Word Length Data is transferred in binary words. These represent the data and instructions in a computer system. W 1010 (x 8 bit binary word) 10101010 (x 16 bit binary word) 10101010 (x 24 bit binary word) Word Length Internal Bus System Clock, clock speed, Word Length & Bus Width

Bus Width Bus width refers to the number of signal wires or lines allocated to a bus. Direction of travel The number of lines in a bus What is the effect of bus width on binary word size? System Clock, clock speed, Word Length & Bus Width

Bus Width No. Of wires in bus The effect of bus width on word size No. Of bits in No. Of a word on different the bus binary words No. Of different Example of a The largest binary words as binary word a power of 2 on the bus counting in denary 1 1 2 21 1 1 2 2 4 22 10 3 3 3 8 23 101 7 4 4 16 24 1100 15 8 8 256 28 11110001 255 16 16 65, 536 216 1101101111110 000 65, 353 20 20 1, 048, 576 220 . . . 1, 048, 575 24 24 16, 777, 216 224 . . . 16, 777, 215 System Clock, clock speed, Word Length & Bus Width