PA0- PA7: port a, it is 8 bit bi-directional i/o pins.

PB0-PB7: port b, It is 8 bit bi-directional i/o pins.

PC0-PC7: port c, It is also a bi-directional i/o pins. It is divided in two sections: PC0-PC3 and PC4-PC7. These two section can be used to transfer 4 bit data.

D0-D7: data pins for data transfer

RESET: reset input, It is used to reset 8255 ic.

RD-bar: read input, it is used to coordination with other signals to send data through data lines.

WR-bar: write input, used in coordination with other signals to send data to 8255.

A1-A0: address pins

00-Port A
01-Port B
10-Port C
11-Control Reigster

CS-bar: chip select

{ 3 comments... read them below or Comment }

  1. You have a great blog and so congratulate to you for helping people. With the BloggerContest.com you are a candidate to win with your website or blog, promote your web page, win prizes and promotions. With the support of our sponsors via we organize our blog competition for the first time in 2017. You can learn more about participation from our website.
    You can join, the applications are ongoing.


    Web : http://www.bloggercontest.com
    Mail : contact@bloggercontest.com
    Pbx : +911194802050

    ReplyDelete
  2. Publicar más que genial, gracias amable





    spot7.org

    ReplyDelete

Labels

- Copyright © 8085 Microprocessor -Metrominimalist- Powered by Blogger - Designed by Johanes Djogan -