Name the modes of 8255 programmable peripheral interface, Computer Engineering

What are the different modes in that 8255 Programmable Peripheral Interface (PPI) can operate? 

  • 24 I/O lines in 3-8-bit port groups - A, B, C
  • A, B can be 8-bit input or output ports
  • C can serve as 2-4-bit input or output ports
  • 3 modes of operation:

- Mode 0: A, B, C simple input or output level sensitive ports

- Mode 1: A, B input or output ports with strobe control in C

- Mode 2: A is bidirectional with control/handshake in B and C

 

Posted Date: 8/20/2013 1:19:14 AM | Location : United States







Related Discussions:- Name the modes of 8255 programmable peripheral interface, Assignment Help, Ask Question on Name the modes of 8255 programmable peripheral interface, Get Answer, Expert's Help, Name the modes of 8255 programmable peripheral interface Discussions

Write discussion on Name the modes of 8255 programmable peripheral interface
Your posts are moderated
Related Questions
The void type is used for  The void type is used to make generic pointers.

Explain the basic performance equation Ans: The basic performance equation is following T = N * S/ R T =>  It is processor time required to execute a program N => act

You are being employed as a novice interaction designer on a project to develop a public kiosk providing information about the exhibits available in a science museum. Consider how

Describe the three mapping techniques used in cache memories with suitable Example. The cache memory is a fast memory that is inserted among the larger slower main memory and t

Define about classes of object oriented modelling A class is a collection of things, or concepts that have the same properties. Each of these concepts or things is known an obj

Read in integers until a zero is read in. Keep a total of both the quantity and the sum of the negative integers and the positive integers. Once a zero is read in (signifying the

Using the memory map below; design an absolute decoding circuit.   The technique is to spot the differences between the start and stop of each device. The Ram chip has the follow

Q. Program for interchanging the values of two Memory locations? Program for interchanging the values of two Memory locations  ; input: Two memory variables of same size:

Q. Explain the Instruction Decode? Instruction Decode: This phase is performed under control of Control Unit of computer. The Control Unit determines the operation which is t

What is Asynchronous Reset? Asynchronous reset: The biggest problem along with asynchronous resets is the reset release, which termed as reset removal. By using an asynchron