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08/03/07 05:08
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#142680 - changing lcd 128x64 to serial
Hello,

I am running out of IO pins in my new project. I am thinking of converting lcd to serial one. I want to use 2 74595 or similar shift registers, soldered directly on lcd module. I will put D0-D7, RW, DI, RST and CS1,CS2 signals on shif res. E signal (and maybe also CS1,CS2) will be connected directly to 8052. This way I will control LCD using 3 lines for shift register (clock, data, strobe) + E line and maybe CS1, CS2.

Will this type of connection slow down lcd? I mean now I need some more time to write data to display. Since 128x64 does not have internal font generator there is a lot of data to be transfered. Will this work in reasonable speed?

Has anyone any suggestion or experience with this?

Commercial serial lcd's are not good since this is a low cost project.



best regards,

Damjan

List of 9 messages in thread
TopicAuthorDate
changing lcd 128x64 to serial            01/01/70 00:00      
   depends            01/01/70 00:00      
      bits and pieces            01/01/70 00:00      
         RE: Why monkey with shift registers...?            01/01/70 00:00      
   Swings and roundabouts            01/01/70 00:00      
   Check your Data Sheet            01/01/70 00:00      
   back to parallel mode            01/01/70 00:00      
      Parralel to Serial            01/01/70 00:00      
         Look closely at graphical LCDs.            01/01/70 00:00      

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