How 8255 programmable peripheral interface can operate, Electrical Engineering

Assignment Help:

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

Twenty Four I/O lines in 38-bit port groups - A, B and C
A and B can be 8-bit input/output ports
C can serve as twenty four-bit input /output ports
3 modes of operation:

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

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

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

A, B can only modify 1 byte at a time
C has individual bit set/reset ability
Improvement is non-dedicated circuit can change port configuration along with software and no "glue logic"
Ports A, B and C are utilized for I/O data.
The control register is programmed to choose the operation mode of the three ports A, B and C.
Mode 0: simple I/O mode
Any of the ports A, B, CL and CU can be programmed as input / output.
No control of individual bits (all bits are out or in

Related Discussions:- How 8255 programmable peripheral interface can operate

What do you mean by circuit analysis techniques, What do you mean by Circui...

What do you mean by Circuit Analysis Techniques? One simplifying technique often used in complex circuit problems is that of breaking the circuit into pieces of manageable

Determine frequency of rotor current, A 3 phase, 6 pole induction motor is ...

A 3 phase, 6 pole induction motor is rated at 400hz, 150v, 10h.p., 3% slip at rated power output. The windage and friction loss is 200w at rated speed. With the motor operating at

Describe the function of material handling system, a) Diagram FMS layout co...

a) Diagram FMS layout configurations with labeling. b) what are the basic components of FMS?Discuss in briefly. c) Describe the function of material handling system.

Analysis of semiconductor devices, Analysis of Semiconductor Devices T...

Analysis of Semiconductor Devices There are two complementary techniques of studying semiconductor devices: Via numerical simulation of the semiconductor equation

Personal and corporate income tax rate, Ginny Jones currently works as the ...

Ginny Jones currently works as the VP-Product Strategy for a well-established enterprise software company. She and her friend, Tom Robinson, currently CFO at a competing firm (and

What is the mobile application development all about, In the previous two y...

In the previous two years, a lot of innovation has come in the mobile computing world. Apple has launched very imaginative mobile phone, iphone and ipad along with app store. Googl

Explain the working of a single stage rc coupled amplifier, Q. Diagram, exp...

Q. Diagram, explain the construction of a single stage RC coupled amplifier? An RC Coupled amplifier consists of a transistor connected in the emitter configuration with neces

Find the minimum practical value frequency, A radar systemuses pulses of du...

A radar systemuses pulses of duration D tomodulate the amplitude of a radio carrierwave. The system can distinguish between targets spaced apart by a distance of d ≥ cD, where c is

What is memory paging, What is memory paging? The memory paging mechan...

What is memory paging? The memory paging mechanism located inside the 80386 and above permits any physical memory location to be assigned to some linear address.

Simulink, I need help in Simulink model (.mdl) (discrete) for the topic “se...

I need help in Simulink model (.mdl) (discrete) for the topic “sensorless control of the pmsm using Back EMF method” with detailed explanation of the estimator (Back EMF method).

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages