9.4.2 Address adjustmentExternal addresses Depending on the selected bus width of the external memory the internal address,which always describe byte addresses, may be shifted before they are output tothe external memory address bus. This way useless address bits are eliminatedand the addressable range of the external memory is increased, if memory with adata bus larger than 8 bit is connected.• external memory with 8-bit data bus- static memory setup: MEMSMCTRL.SDATAWn[2:0] = 100B- SDRAM setup: not supported- external address output MA[24:0] = internal address- maximum memory 225 • 1 byte = 32 MB per chips select• external memory with 16-bit data bus- static memory setup: MEMSMCTRL.SDATAWn[2:0] = 000B- SDRAM setup: MEMSCONR.DDATAW[1:0] = 00B- external address output MA[24:0] = internal address >> 1- maximum memory 225 • 2 byte = 64 MB per chips select• external memory with 32-bit data bus- static memory setup: MEMSMCTRL.SDATAWn[2:0] = 001B- SDRAM setup: MEMSCONR.DDATAW[1:0] = 01B- external address output MA[24:0] = internal address >> 2- maximum memory 225 • 4 byte = 128 MB per chips selectExternal Memory Interface Controller Chapter 9Preliminary User's Manual S19203EE1V3UM00 311
