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
how can be a karnaugh map of the count of sequence: 0-5-6-9-11-14

Diac Diac is a device which  has di electrode  and as its name suggests it works  on AC. The cross  sectional view of a diac is shown if the four layers are PNPN and PNPN .

A system contains an amplifier with a gain of 10 offering the armature voltage for a motor which provides an output speed which is proportional to the armature voltage, the constan


Q. An FM station's modulator has a sensitivity k FM = 5π × 10 4 rad/s·V. A receiver uses a discriminator that has a gain constant of 10 -5 /π V·s/rad. Neglecting noise, determin

Q. What is the requirement of a hybrid in telephone networks? How does it work? Ans: Digital exchanges require receive and transmit signals on separate two-wire circuits. Th

Carrier Concentrations For the calculation of semiconductor electrical properties and analyzing device behavior, it is necessary to know the number of charge carrier

Use Thevenin's Theorem, find the current flow by resistor R=10Ω.

Activities to Preparing Long-term Plans 1. Data collection regarding existing loads, forecast of expected loads, operating conditions, and etc. from Grid substation up to cons

Q. Advanced Mobile Phone System? Cellular systems employed cells with a radius in the range of 5-18 km. The base station usually transmitted at a power level of 35 W or less, a