Monday, December 26, 2011

8086 microprocessor in minimum mode

Minimum mode in 8086 microprocessor :-
Microprocessor 8086 is operated in Minimum mode by strapping its MN/MX pin to logic 1.In this mode, all the control signals are given out by the microprocessor chip itself . There is a single microprocessor in the minimum mode system.
The figure below shows the microproceesor 8086 in minimum mode. The block digram shows various components in the systems like latches,transceivers,clock generator or i/o devices.
The latches that are used to separate the valid address from the multiplexed address are generally buffered utput D-type flip-flop,like 74lS373 . The latches are controlled by ALE. Transreceivers are bidirectional buffers and sometimes they are called data amplifiers.
DT/R indicates the direction of data. T means transfer in case of write and R means receiving data in case of write cycle.
20 address lines and 16 data lines is clearly shown in the figure below.

The working of the minimum mode in next post.

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Himanshu Dureja is an engineering student and part time blogger.