Input output operations , Electrical Engineering

Assignment Help:

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.

 


Related Discussions:- Input output operations

What do you mean by diversifiability of total risk, Q. What do you mean by ...

Q. What do you mean by diversifiability of total risk? Traditional finance theory assets that the rate of return on risk assets depends on the size of business risk, financial

Find the voltage at the load terminal, Q. Two three-phase generators are su...

Q. Two three-phase generators are supplying to a common balanced three-phase load of 30 kW at 0.8 power factor lagging. The per-phase impedance of the lines connecting the generato

Dual-ramp analog to digital converter, Q. Dual-ramp analog to digital conve...

Q. Dual-ramp analog to digital converter? Figure (a) shows the block diagram of a dual-ramp (dual-slope) A/D converter. After a start-of-conversion pulse, the counter is cleare

Elucidate the nature of signals produced, Q. Elucidate the nature of signal...

Q. Elucidate the nature of signals produced on subscriber's loop by a pulse dialer and a touch tone dialer.  Ans: DTMF is a simple two-of -eight encoding scheme where every

Comparison of analog-modulation systems, Comparison of Analog-Modulation Sy...

Comparison of Analog-Modulation Systems The comparison of analog modulation systems (conventional AM, DSB SC, SSB SC, VSB, FM, and PM) can be based on three practical criteria:

Evaluate gm and pm for the asymptotic bode plot, Q. The loop gain of an ele...

Q. The loop gain of an elementary feedback control system(see Figure) is given by G(s)·H(s), which is 10/(1+s/2)(1+s/6)(1+s/50). Sketch the asymptotic Bode plot of the loop-gain fu

Actual voltage reading in decimal, Prepare the assembly code to make a Digi...

Prepare the assembly code to make a Digital Volt Meter that shows the message and the correct voltage on the LCD. Once you managed to display the hex value for the conversion you w

Determine the load - thevenins equivalent circuit, Determine the load - The...

Determine the load - Thevenins Equivalent Circuit: Determine the load for which the source shall transfer the maximum power if load is connected across the terminal A and B, u

Demultiplexer, full sub tractor using demultiplexer

full sub tractor using demultiplexer

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd