We have requirment to add NOR flash and Ethernet controller into existing Controller(MCF5206EUM) in expansion board.(Note: Expansion board is plugged on main board and main board will not change). Current system has PAR value of 0001 to use A27-WE0, A26-WE1, A25-CS5, A24-CS4(refer MCF5206EUM/D, rev.1 Table 8-8). We want to realign existing memory map and insert NOR flash & Ethernet controller into memory by moving other peripheral into available unused memory.
- Can you suggest any impact by realign existing memory map, considering existing hardware design?
- Is there a way to create additional chip select in controller using PAR?(Note: In current design, any change in PAR value is resulting in system crash or boot issue)
- We want to use unused memory range and can it be addressable? Current memory map details: DRAM(4M), SRAM(1M), BBRAM1(1M), BBRAM2(2M), Flash CHIP1(128K), empty1(1.876M), I/0(1k), empty2(3K), EEPROM(4K), empty3(~3G).
For example, Can we move BBRAM2(2M) into empty3 and use BBRAM2 for other peripheral?