Shop OBEX P1 Docs P2 Docs Learn Events
Can somebody decode this document for a 7 segment LCD pleeeeeeeeas. — Parallax Forums

Can somebody decode this document for a 7 segment LCD pleeeeeeeeas.

BoeKid from PRBoeKid from PR Posts: 8
edited 2007-04-29 17:30 in General Discussion
··· I found a electronic kit with some IC's and I saw use in this chip. It's made by PHILIPS and it's serial is HEF4511BP, I reserch the document sheet on the WWW and I now it can be use with something like a (PBASIC command) SHIFTOUT.·I just can't figure out how to.
·· Thank You!!!

P.D. I attached the PDF.
pdf
pdf
4511.pdf
108K
4511.pdf 108.5K

Comments

  • FranklinFranklin Posts: 4,747
    edited 2007-04-29 03:05
    According to the doc. you put data in the form of binary on da through dd and connect the display to oa through og look at page 2 for the pins and page 4 for the logic diagram.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    - Stephen
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2007-04-29 16:35
    Input is not whole bytes.

    Actually 'binary coded decimal' is used. That is a 4 bit number,
    but goes from 0 to 9.

    Normally you can get 'hexidecimal' out of a 4 bit number, but it look as though you are limited to ten digits - no A, B, C, D, E, or F.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "If you want more fiber, eat the package.· Not enough?· Eat the manual."········
    ···················· Tropical regards,····· G. Herzog [noparse][[/noparse]·黃鶴 ]·in Taiwan
  • BoeKid from PRBoeKid from PR Posts: 8
    edited 2007-04-29 16:50
    ·· I had to study so I didin't have time to keep trying stuff. But I am going to try the suggestions. Still I have to guess which is Data Pin and which one is Clock Pin.·And what's the diference of a 4 bit, do I write something like %0010 for the number 2.·And whats up with the EL pin do I apply the LOW command send the byte and then send a HIGH command to the EL pin?sad.gif

    Thanks, I'll keep trying.
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2007-04-29 17:30
    · The 4511 is not a shift register.· The 4511 does not have a Clock pin.· It has four input pins (they are parallel, there is no serial Data In on this.)· The 4511 data inputs are pins 6, 2, 7, 1 (D-C-B-A, most significant to least significant bits.)
    · If you are figuring on using SHIFTOUT, you'll need a separate shift register IC(Stamp --> shift reg. --> 4511.)
    · Setting the Latch locks the output, if you're shifting data then you would get garbled characters during the shifting, it may look spastic.· You could just leave it Low (at GND.)
    · You asked: "...do I write something like %0010 for the number 2".· Yes.
    · Also, you need a common-cathode 7-segment display, using the common-anode type will require the use of transistors.
Sign In or Register to comment.