Draw & explain block diagram of 8259 PIC.

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written 8.3 years ago by

teamques10 ★ 69k

• modified 8.0 years ago

Mumbai University > Computer Engineering > Sem 5 > Microprocessor

Marks: 10M

Year: Dec 2014

microprocessors and applications

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So accurate...and easily understandable

8.0 years ago by teamques10 ★ 69k

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written 8.3 years ago by

teamques10 ★ 69k

Fig below shows the internal block diagram of the 8259A.
It includes eight blocks: data bus buffer, read/write logic, control logic, three registers (IRR, ISR and IMR), priority resolver, and cascade buffer.

enter image description here

Data Bus Buffer: The data bus buffer allows the 8085 to send control words to the 8259A and …

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