Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
08/28/06 04:16
Read: times


 		 #123172 - That's not relevant!
Responding to: ???'s previous message
The specific model of the LCD itself, LCD meaning Liquid Crystal Display, is not an issue. What's at issue is the CONTROLLER IC. If it's an HD44780, then THAT and only that, is what you have to study out and know how to use.

It's THAT and only THAT datasheet that matters from the standpoint of the interface, because THAT and only that is what defines the interface and all the associated requirements. If you use it correctly, you need concern yourself with no other details.

If you fail to comply with the controller specifications, it may seem to work from time to time, but, sooner or later, it will fail and you won't know why. How many HD44100's or other devices are present doesn't matter. So long as there's an HD44780, that's the guy you have to persuade to do what you want. Now, in some cases, there are TWO of these. In that case, you have to talk to each of the separately, by means of a separate and distinct 'E' strobe. Aside from that, they're the same and can share all the remaining signals.

RE


List of 52 messages in thread
TopicAuthorDate
4-bit LCD ... single PORT            01/01/70 00:00      
   there's a datasheet            01/01/70 00:00      
      LCD datasheets ...            01/01/70 00:00      
         the Hitachi Datasheet for HD44780 is not like that            01/01/70 00:00      
         VFDs: Lucky b*stard            01/01/70 00:00      
   4-bit LCD            01/01/70 00:00      
      There are examples on 8052.COM if you search            01/01/70 00:00      
         And you don't need R/W*            01/01/70 00:00      
            but be aware! You discard several functions.            01/01/70 00:00      
               on saving pins            01/01/70 00:00      
                  wait a minute ...            01/01/70 00:00      
                     Richard, please            01/01/70 00:00      
                        Why should he change direction?            01/01/70 00:00      
                           no such impilcation            01/01/70 00:00      
                              well, the logic is simple ...            01/01/70 00:00      
                                 OK, as always            01/01/70 00:00      
                  Richard, quit bickering            01/01/70 00:00      
                     it goes to an OLD issue            01/01/70 00:00      
                        as I see it is that this is GREAT.            01/01/70 00:00      
                  On saving pins            01/01/70 00:00      
                  read the forum messages, don't glance            01/01/70 00:00      
   Here is my example            01/01/70 00:00      
      why do you persist in 'advertising' this CRAP            01/01/70 00:00      
         Attack, Attack, Attack.            01/01/70 00:00      
            get your facts straight            01/01/70 00:00      
               Did you understand real life ?            01/01/70 00:00      
                  yes, I do            01/01/70 00:00      
   Answer            01/01/70 00:00      
      Jon, great answer            01/01/70 00:00      
         Yes, indeed, ... BUT ...            01/01/70 00:00      
            How do you know...            01/01/70 00:00      
               It's possible that things worked that way            01/01/70 00:00      
   Better late than never            01/01/70 00:00      
      \"It works\"            01/01/70 00:00      
         Yes, it does            01/01/70 00:00      
            does that mean they're all alike?            01/01/70 00:00      
               Yes, if all guys would read the datasheets...            01/01/70 00:00      
                  Hitachi JHD 162a            01/01/70 00:00      
                     Point missed            01/01/70 00:00      
                     That's not relevant!            01/01/70 00:00      
                        Advice appriciated            01/01/70 00:00      
                           where are you going to find that?            01/01/70 00:00      
      well, you just posted your own 'comment'            01/01/70 00:00      
   Simple Guidance            01/01/70 00:00      
      One LCD, One Port            01/01/70 00:00      
      horsefeathers, male cow manure            01/01/70 00:00      
   GOD!!!            01/01/70 00:00      
      try a shadow register            01/01/70 00:00      
   Full assembly Code ... LCD 4 bit            01/01/70 00:00      
      On first reading...            01/01/70 00:00      
      probs in 2 SUBROUTINES ...            01/01/70 00:00      
   Many ways to skin a cat            01/01/70 00:00      

Back to Subject List