Connect with us

lcd interfacing

Discussion in 'Microcontrollers, Programming and IoT' started by SNEHAL, Nov 23, 2010.

Scroll to continue with content
  1. SNEHAL

    SNEHAL

    14
    0
    Nov 10, 2010
    in a lcd to 8051 interfacing diagram,what are the directions of the control lines that start from RS,R/W,E.?
     
  2. barathbushan

    barathbushan

    223
    0
    Sep 26, 2009
    are you a VTU student ??
     
  3. SNEHAL

    SNEHAL

    14
    0
    Nov 10, 2010
    I don't get u sir.My discipline is Electronics and telecomm.
     
  4. barathbushan

    barathbushan

    223
    0
    Sep 26, 2009
  5. SNEHAL

    SNEHAL

    14
    0
    Nov 10, 2010
    i've seen this schematic before.but the lines that emanate from RS,R/W,E .what cud be their possible directions???
     
  6. barathbushan

    barathbushan

    223
    0
    Sep 26, 2009
    for an LCD module

    rs- this is used to select the command mode or data mode , the signal goes to this pin from the 8051

    RW=when set to' 0' , data is read from the lcd and when set to '1' data is sent to the lcd
    so it is a bi-directional connection to the 8051

    E=1 to operate the LCD , this pin is controlled by 8051 , so the direction is from 8051 to this pin
     
  7. SNEHAL

    SNEHAL

    14
    0
    Nov 10, 2010
    thank you sir! how does a lcd function in its 4-bit mode?
     
  8. barathbushan

    barathbushan

    223
    0
    Sep 26, 2009
    in 4 bit mode , both the command and data are sent in strings of 4 bits
    so Mask the lower 4-bits , then send it to the port , and when enabled by another pin , lcd accepts the 4 bits and displays it .
    next mask the upper 4 bits , send it to the port and enable it .

    Do this for both command and data modes
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-