1.

What are the main features of 8255?

Answer»

Features 

1. High speed and low speed consumptions due to CMOS technology. 

2. It is PPI device . 

3. Power supply ranges 3 volts to 6 volts. 

4. PPI has 24 I/O programmable pins in groups of 12 pins which are arranged as 3 8 bit ports (PORT A,PORT B,PORT C). 

5. it is used for the interface to keyboard and parallel to printer port



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