Shop OBEX P1 Docs P2 Docs Learn Events
How many pins — Parallax Forums

How many pins

Matthew BurmeisterMatthew Burmeister Posts: 49
edited 2008-01-31 20:57 in BASIC Stamp
how many pins will a parallel LCD use on a Basic Stamp?

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
When the blue smoke comes out of a Basic Stamp... You know that you did something wrong... -- Matthew

Comments

  • JedJed Posts: 107
    edited 2008-01-31 15:09
    That info can be found in the manual found on the product page:
    parallax.com/Portals/0/Downloads/docs/prod/audiovis/lcd2x16par.pdf

    I believe it's 7 pins for parallel communication in 4 bit mode, otherwise 14 pins.

    Post Edited (Jed) : 1/31/2008 3:21:40 PM GMT
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-01-31 20:57
    Matthew,

    A parallel LCD will require a minimum of 6 I/O lines to use or 7 are required if you want to be able to read any data back. This is in 4-bit mode. For 8-bit mode it would be 11 I/O lines…If you’re using 8-bit mode you’d want to have full R/W access so…As a note, with faster microcontrollers, such as the SX or Propeller, you’ll want to read the BUSY Flag before writes to ensure you’re not overrunning the on-board controller. This applies to 4-bit or 8-bit mode. I hope this helps. Take care.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Chris Savage
    Parallax Tech Support
Sign In or Register to comment.