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

What are the different types of patrolling, Q. What are the different types...

Q. What are the different types of Patrolling? When these are adopted? What are points to be considered while preparing the charts? Ans.- Types of Patrolling. 1. Keyman's

Explain analog communication system, Q. Explain Analog communication system...

Q. Explain Analog communication system? Analog signals in an analog communication system can be transmitted directly via carrier modulation over the communication channel and d

Determine the Service and Backwash Rates, Determine the Service and Backwas...

Determine the Service and Backwash Rates The system on site is a pressure sand filter, with a service curve. The filter is backwashed using the feed pump, at a higher flow rate, s

Npn bipolar junction transistor, NPN: Figure: The symbol of an ...

NPN: Figure: The symbol of an NPN Bipolar Junction Transistor. NPN is one of the two sorts of bipolar transistors, where the letters "N" (negative) and "P" (positi

What is microprocessor, Write short notes of the following. a)    Microproc...

Write short notes of the following. a)    Microprocessor b)    Modes of data transfer. c)    I/O processor d)    Associative memory e)    Software and Hardware interrupt

Case 1 b>a - program description , Case 1 (B>A) Suppose XX = 01H ( s...

Case 1 (B>A) Suppose XX = 01H ( stored in a) and YY = 03H (stored  in B).then carry flag  will set by  CMP  instruction since B>A  in this case JNC  will not  transfer the e

Sketch the resulting transfer curves, Q. Consider the MOSFET circuit with v...

Q. Consider the MOSFET circuit with variable voltage, with RD = 2k and VDD = 12 V. The static characteristics of the n-channel enhancement MOSFET are given in Figure. (a) Drawt

Mention some characteristics of transistors, Q. Mention some characteristic...

Q. Mention some characteristics of transistors? · When a NPN transistor is working, there is always a constant 0.6 volt drop between the base and emitter, i.e., the base is alw

Factors affecting frequency response of an amplifier, Q. What is their rela...

Q. What is their relation with gain? What are the factors affecting frequency response of an amplifier? Some amplifiers should be "flat" across a band of frequencies. In other

Mesh analysis procedure, Mesh analysis procedure : 1.  Assign a distinct...

Mesh analysis procedure : 1.  Assign a distinct current to every closed loop of the network. 2.  Apply KVL around every closed loop of the network. 3.  Solve the resulting

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