Wednesday, May 13, 2015
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There is problem in bus that you have to know!
Single Bus Problem
Lots of devices on one bus normally face quite a number of
problem the common one are delay the propagation, because connecting many
device will lead to long data paths and meaning that co-ordination of bus use
can adversely affect the performance if aggregate data transfer approaches bus
capacity.
The solution are : Using multiple buses
to overcome the problems.
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Lots of devices on one bus leads to:
ReplyDeletePropagation delays (the greater the bus length, the greater the propagation delay)
This delay determines the time it takes for devices to co-ordinate the use of the bus. When control of the bus passes from one device to another frequently, these propagation delay can adversely affect performance
This problem can solved to some extent by increasing the data rate that the bus can carry and by using wider data buses (from 32 to 64 bits)
Most systems use multiple buses to overcome these problems as data rates generated by graphics and video controllers are growing rapidly.