The address range assigned to the OCM memory exists in the higher 256 KB in the 4 GB address map (32-bit addressing). This cannot be modified.
The 256 KB RAM array is mapped to a high address range
(0xFFFC_0000 to 0xFFFF_FFFF) in a granularity
of four independent 64 KB banks. Each bank is on a separate power island controlled
by the PMC. The mapping summary is listed in the following table.
| Memory Bank | Address Range | Size |
|---|---|---|
| 0 |
0xFFFC_0000 to
0xFFFC_FFFF
|
64 KB |
| 1 |
0xFFFD_0000 to
0xFFFD_FFFF
|
64 KB |
| 2 |
0xFFFE_0000 to
0xFFFE_FFFF
|
64 KB |
| 3 |
0xFFFF_0000 to
0xFFFF_FFFF
|
64 KB |