
THE HARDWARE STRUCTURE OF 8086 211
Example 6.1
What is the duration of the bus-cycle in an 8086 based microcomputer, if the clock frequency
is 12 MHz and three wait states are inserted?
Solution
e period of a 12 MHz microprocessor is T = 1 / f = 83 ns.
us, the duration of the bus-cycle, without any wait-states is given by;
T
bus-cycle
= 4* T = 4* 83 ns = 332 ns.
Duration of the wait-states is, T
W
= 3* T = 249 ns.
So the extended bus-cycle T
bus-cycle
+ T
W
= 332 + 249 = 581 ns.
6.2.3 | Write Machine Cycle
e steps in a write machine cycle are (refer Section 0.2.5):
Place on the address bus, the address of the location to which data is to be w ...