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oksian1 [2.3K]
3 years ago
8

17. What are the basic modes of operation of 8255?Write the features of mode 0 in 8255?

Computers and Technology
1 answer:
Andru [333]3 years ago
8 0

Answer:

There are two basic operational modes of 8255:

Bit Set/Reset mode (BSR mode).

Input/Output mode (I/O mode).

Features of 8255 Microprocessor:

Mode 0 : Simple Input/Output.

Mode 1 : Input/Output with handshake.

Mode 2 : Bi-directional I/O data transfer.

It has three 8-bit ports : Port A, Port B, and Port C, which are arranged in two groups of 12 pins.

The 8255 can operate in 3 I/O modes : (i) Mode 0, (ii) Mode 1, & (iii) Mode 2.

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