Stepper Motor Interfacing With 8255 Pdf File
Stepper Motor Interfacing With 8255 Pdf Download
Stepper Motor Interfacing With 8255 Pdf Printable

UNIT- III Interfacing of 8086 with 8255, 8254/ 8253, 8251, 8259: Introduction, Generation of I/O Ports, Programmable Peripheral Interface (PPI)-Intel 8255, Sample-and-Hold Circuit and Multiplexer, Keyboard and Display Interface, Keyboard and Display Controller (8279), Programmable Interval timers (Intel 8253/8254), USART (8251), PIC (8259), DAC, ADC, Stepper Motor. Interfacing Analog to Digital Data Converters. In most of the cases, the PIO 8255 is used for interfacing the analog to digital converters with microprocessor. We have already studied 8255 interfacing with 8086 as an I/O port, in previous section. This section we will only emphasize the interfacing.

Stepper motor is an electromechanical device that rotates through fixed angular steps when digital inputs are applied. It is suitable for precise position, speed and direction control which are required in automation system.

The angle through which stepper motor rotates with a fixed angle for each digital data is called step angle.

1 Interfacing Stepper Motor to 8086 Using 8255 - Free download as PDF File (.pdf), Text File (.txt) or read online for free.
Interfacing Analog to Digital Data Converters. In most of the cases, the PIO 8255 is used for interfacing the analog to digital converters with microprocessor. We have already studied 8255 interfacing with 8086 as an I/O port, in previous section. This section we will only emphasize the interfacing.
Feb 05, 2020 SECTION INTERFACING Chapters 12 and 13 detailed real-world the to LCDs, stepper motors, and ADC devices, then program it using. Upon completion of this chapter, you will be able to:» Describe how to expand the I/O ports of the /51 by connecting it to an chip» List the 3 ports of.

Different stepper motor has different step angle. The more frequently used stepper motor has step angle of 0.9 degrees and 1.8 degrees.

Depending on the sequence applied to stepper motor, it can be classified in two category:

1. 4- Step sequence or full step sequence
2. 8- Step sequence or half step sequence
Calculations:

1. Total no. of steps=
Ex: = 200 steps are required to complete one rotation

2. Total no. of repeated steps=
Ex: = 50 repetition of sequence = (32) in Hexadecimal.
4-Step sequence:

In this type of functioning, the following 4 binary sequence/code are used for rotation: (Considering step angle= 1.8 degrees)

8-Step Sequence:

In this type of functioning, the following 8 binary sequence/code are used for rotation: (Considering step angle= 0.9degrees)

Chips select Logic: With

Control word Format:
=80H
Program:

In the above program in look up table if the 4-step sequence for clock wise then stepper motor will rotate in clockwise direction and if the 4-step sequence for anti-clock wise then stepper motor will rotate in anti-clockwise direction.

Stepper Motor Interfacing With 8255 Pdf File

Speed control of stepper motor is achieved by writing program to rotate stepper motor continuously in delay program. We can change the delay between two steps and thus change the speed of stepper motor.

Interfacing diagram of Stepper motor with 8085

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Stepper Motor Interfacing With 8255 Pdf Download

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Stepper Motor Interfacing With 8255 Pdf File

Interfacing diagram of Stepper motor with 8085

Stepper Motor Interfacing With 8255 Pdf Download

Stepper Motor Interfacing With 8255 Pdf Printable