Mixed SRAM and FLASH EMIF | Cypress Semiconductor
Mixed SRAM and FLASH EMIF
I would like to add 128Mbits of NOR flash and 16 Mbits of SRAM into a graphical LCD project (800x480 pixels). They need to share the same address and data bus due to the limited number of pins available on the PSoC5LP. This memory and storage expansion is necessary because of the larger graphics files. The PSoC5 simply doesn't have enough resources on chip to handle the graphics files.
In order to make this fly, it is necessary to find SRAM and FLASH that can live comfortably on the same bus. I'd like to just use the EMIF interface to handle all transactions. I've looked around a bit, but I haven't found any NOR flash chips that allow for simple reads and writes. Surely there must be because the EMIF datasheet seems to imply compatibility with NOR flash (no mention of needing to use a custom interface).
Has anyone had luck in a project trying to do this? Any suggestions on candidate RAM and FLASH chips?