Input output operations , Electrical Engineering

Input Output Operations

Many times microprocessor has to  accept data  from input port and send data to  output  port to  interact with the  real world. Input  port is  tri state buffer  and output  port is  latch  tri state buffer  and latch  are already discussed in chapter. These input output ports  are identified by 8  bit address 8 bit port address of these input output ports may be any  of the 256 combinations of 8 bit  from 00H FFH. It means 8085  may communicate with  256 different  input  port and 256 different  output  ports. These input output ports are called  parallel port  i e 8 bit data is  transferred between  microprocessor and input output  port. Following s instruction  are used  to communicate  with input output.

Important: No  flags  are modified by input  output  operation.

 

Posted Date: 4/4/2013 6:00:37 AM | Location : United States







Related Discussions:- Input output operations , Assignment Help, Ask Question on Input output operations , Get Answer, Expert's Help, Input output operations Discussions

Write discussion on Input output operations
Your posts are moderated
Related Questions
what are the classifications of fixed resistor?explain

What is the expected peak demand for a transformer feeding the following loads?                           Connected                 kVA

What are the functional types used in control words of 8251a? The control words of 8251A are divided into two functional types. 1. Mode Instruction control word 2. Comman

Q. 10-kVA, 4800:240-V, 60-Hz, single-phase transformer has an equivalent series impedance of 120 + j300  referred to the primary high- voltage side. The exciting current of the tr


Illustrate Common Emitter configuration, current amplification factor and collector amplifier. Describe transistor as an amplifier.


Connection of Shunt Capacitors at  Distribution Transformer Provision of capacitors at load point is found to be hard in practice because of the additional investments needed.

Q. Explain about Half Duplex Transmission? Half Duplex Transmission A half-duplex channel can receive andsend, though not at the same instance. It's like a one-lane bridge w

Q. Determine v o /v i for the circuit shown in Figure if the op amps are ideal.