Program memory is 512 KB of Flash, organised as 512K x 8. That is enough for a real-time OS, a TCP/IP or CANopen stack, and a moderate application layer without resorting to code compression or overlays. The 64K x 8 SRAM supports a few kilobytes of stack, heap, and DMA buffers; if the application needs frame buffers or large lookup tables, plan to use the EBI/EMI interface for external memory expansion.
108-ball BGA — footprint and rework notes
That is a 10 mm square array with 0.8 mm pitch typical for this ball count — tight enough that hand rework needs a hot-air station with a fine nozzle and a stencil for reballing. The BGA sits on a standard FR-4 land pattern; no exposed pad to stitch, but the inner balls carry the core supply and ground, so decoupling caps should sit within 5 mm of the package perimeter on the top layer.