Hello friends,
Im using 7 inches TFT module (800x480) with LPC1788 controller. This is the first time I'm using a TFT module. Somehow I have managed to get some theoretical idea about TFT. But I have confused with the use SDRAM with TFT module. Is SDRAM is optional or it is compulsory if we are using a TFT LCD especially 7 inches LCD? Can someone please help me regarding this issue?
Thank you Andrew for your kind reply but i didn't see much information in that thread. So if someone could give me some idea regarding this issue it would be really helpful to me. Thank you
Say you have a 2 gallon bucket, and need to collect 5 gallons of water?
Does this non-specific 7" panel have a part number? Nobody here has seen your set up.
Does the LPC1788 have enough SRAM for a frame buffer? Does the panel have a controller, or is it dumb?
With a 24-bit colour depth at 800x480 we're talking about 1.1 MB of frame buffering? If neither the CPU or PANEL have that much RAM, then yes you'll probably want to use some SDRAM to accommodate it.
Thank you Westonsupermare Pier for your kind reply. I got the idea and Im now searching for some document for programming SDRAM. Can anyone please suggest me some materials or websites for reference. Thank you..
...searching for some document for programming SDRAM A RAM is used at run-time (and hence programming is not a term related to RAM. there is nothing like 'programming a RAM').
It is likely that you may require external SDRAM (LPC1788 has on-chip 96KB RAM which may serve the purpose but it depends upon the application you write & how well you utilize the RAM)
But to store the images (that may be required to be displayed on the TFT screen) you may require a non-volatile memory (NAND Flash or NOR Flash or SD Card). Hence, IMO, you need to interface a NAND Flash or NOR Flash (read cycle in NOR Flash is faster as compared to NAND Flash) or SD card. SD Card may not be a wise option as data transfer is slower as compared to both NAND & NOR Flash.
Study the merits/demerits of each and choose accordingly.
Thank you Dhaval Solanki. Now Im getting it...
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