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???
01/22/08 14:19
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 		 #149834 - Write-Only Memory
Responding to: ???'s previous message
http://en.wikipedia.org/wiki/Write_Only_Memory

Ap Charles said:
Also I dont know any RAM where you cant Read data, If it exists please update me.

Generally speaking, a display is an output device - so you wouldn't necessarily expect to be able to read-back anything that you'd sent to it?

Of course, the RAM itself can be read and written - it could just be that no interface is provided for the host to read-back what it wrote...?

A bit like the 8051's UART transmit register: once you've written to it, you can't read-back what you wrote.

List of 42 messages in thread
TopicAuthorDate
guidance for LCD CGRAM ...            01/01/70 00:00      
   What guidance?            01/01/70 00:00      
   Did you mean this            01/01/70 00:00      
   reading?            01/01/70 00:00      
      reading?            01/01/70 00:00      
         how do you know?            01/01/70 00:00      
            Are you joking Malund , He says CGRAM            01/01/70 00:00      
               Write-Only Memory            01/01/70 00:00      
                  Write-Only Memory            01/01/70 00:00      
                     Possibility            01/01/70 00:00      
                     nope            01/01/70 00:00      
                  take another look at the datasheet            01/01/70 00:00      
                     NOBODY mentioned "a HD44780-style controller "            01/01/70 00:00      
                        So ... Erik ... what did you perceive?            01/01/70 00:00      
                           Oh, it\'s typical            01/01/70 00:00      
                              Erik must always be right ...            01/01/70 00:00      
                                 well so must Richard            01/01/70 00:00      
                     read more carefully!            01/01/70 00:00      
                        So ... what does "generally" mean to you?            01/01/70 00:00      
                           Generally            01/01/70 00:00      
                              loves them            01/01/70 00:00      
                                 Common LCD modules            01/01/70 00:00      
                                    BALONEY            01/01/70 00:00      
                                       I was trying to help            01/01/70 00:00      
                                          I only had a problem with the first part of 9)            01/01/70 00:00      
                                          the OP is better equipped to reply            01/01/70 00:00      
                              So what's your point?            01/01/70 00:00      
               Not (as far as access goes) a RAM, but a LCD modul            01/01/70 00:00      
                  In that case it may be            01/01/70 00:00      
                     HUH?            01/01/70 00:00      
                        Atleast            01/01/70 00:00      
                           especially...            01/01/70 00:00      
                     Wasn't that Erik's point?            01/01/70 00:00      
                        Neil just name the Write only Module ;-)            01/01/70 00:00      
   How about ...            01/01/70 00:00      
      Is that a Read Only Module            01/01/70 00:00      
         Yellow Light            01/01/70 00:00      
            Ap, please            01/01/70 00:00      
         Not module-specific            01/01/70 00:00      
            Not module-specific - But its a wonderful site            01/01/70 00:00      
               noritake costs            01/01/70 00:00      
         perhaps it is different from the "usual" interface            01/01/70 00:00      

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