External Memory

The P2-EC32MB (as seen held by the shrine maiden on the page header) is equipped with four QPI-interface pseudo-static RAM (PSRAM) chips, together holding 32 MiB of data that can be accessed through a 16 bit bus.

Other common memory configurations include:

• Rayslogic 24MB Add-on: 3 PSRAM chips, 4 bit bus.
• Rayslogic 96MB Add-on: 12 PSRAM chips, 8 bit bus.
• Parallax 64004-ES HyperRAM/HyperFlash Add-on: TODO HyperRAM is different. 8 bit bus.

TODO. In the meantime, check the PSRAM chip datasheet.