How is 8255 (programmable peripheral interface) configured, Electrical Engineering

Assignment Help:

How is 8255 (Programmable Peripheral Interface) configured if its control register contains 9B h.

Ans.

1669_Programmable Peripheral Interface.png

Programmable Peripheral Interface

Command Byte B (sets or resets any bits in port C)

1196_control register.png

BH => 1001 1011 =>

6b5=00-> Mode0

4=0-> Port A as input

3=1-> Port C as input (PC7-PC4)

2=0-> Mode 0

1=1-> Port B as input

0=1-> Port C as input (PC3-PC0).


Related Discussions:- How is 8255 (programmable peripheral interface) configured

M6a2: lab: the floating-point unit, Introduction The purpose of this ex...

Introduction The purpose of this experiment is to examine the operation of the floating-point unit. Procedure 1. Show how the number 355.6 is converted into a normalize

Compare with memory, Compare with memory The contents  of the memory...

Compare with memory The contents  of the memory  of the memory  location  pointed by HL  register pair are compared with the  contents of the accumulator. The  instruction f

Explain about junction fet, Q. Explain about Junction FET? The JFET is ...

Q. Explain about Junction FET? The JFET is a three-terminal, voltage-controlled current device, whereas the BJT is principally a three-terminal, current-controlled current devi

Three phase induction motors - motor control , Three Phase Induction Motors...

Three Phase Induction Motors A three  phase induction rotor  consists  a stators  and a motor stator has balanced three  phase  winding. These windings  are distributed in the

What do you mean by digital building blocks, Q. What do you mean by Digital...

Q. What do you mean by Digital Building Blocks? Whereas a continuous change from one value to another is the essential characteristic of an analog signal and continuous-state (

Determine capacitance of capacitor, Determine Capacitance of capacitor: ...

Determine Capacitance of capacitor: A 20 Ω resistor is connected in series with a coil, a capacitor and an ammeter across a 25 V variable frequency supply. While the frequency

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

Neutral line in transformer, thus secondary winding of transformer consists...

thus secondary winding of transformer consists of neutral line or not?

Find the meter reading for a sine wave, Q. ADMM (digital multimeter) reads ...

Q. ADMM (digital multimeter) reads true rms values of current. If the peak value of each of the following periodic current waves is 5 A, find the meter reading for: (a) a sine wave

Clippers, dis advantage of series clippers?

dis advantage of series clippers?

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