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Answer all the questions below , An array of LEDs as connected below, is needed to be accessed by the 8255a interfacing. (a) Find the value of A0 to A7 in order to address port A and control register. (b) Find the logic circuit in order to keep chip select low while accessing control register and port A. (c) Construct the code segment in order to keep the LED array blinking on and off in an infinite loop. Initialize the 8255a as needed. Provide comments wherever necessary.

Answer all the questions below , An array of LEDs as connected below, is needed to be accessed by the 8255a interfacing. (a) Find the value of A0 to A7 in order to address port A and control register. (b) Find the logic circuit in order to keep chip select low while accessing control register and port A. (c) Construct the code segment in order to keep the LED array blinking on and off in an infinite loop. Initialize the 8255a as needed. Provide comments wherever necessary.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Answer all the questions below ,

An array of LEDs as connected below, is needed to be accessed by the 8255a interfacing.

(a) Find the value of A0 to A7 in order to address port A and control register.

(b) Find the logic circuit in order to keep chip select low while accessing control register and

port A.

(c) Construct the code segment in order to keep the LED array blinking on and off in an infinite

loop. Initialize the 8255a as needed. Provide comments wherever necessary.

A1 A0 80H PORT A Memory addresses 81H PORT B 1 1 0 82H PORT C 83H CINTROL REGISTER 1 1 AO A1 Port A 8086 A2 Logic? CS A7 8255A
Transcribed Image Text:A1 A0 80H PORT A Memory addresses 81H PORT B 1 1 0 82H PORT C 83H CINTROL REGISTER 1 1 AO A1 Port A 8086 A2 Logic? CS A7 8255A
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