I think it's the BOOTROM, I'll check in debugger, you can check the sources...
You can try these:
_This is the beginning of ISR vector table.
_
You can try these:
Not sure if XIP cache gets untouched during boot stage 1, but with USB you can get away if not used at all.4.2.1. Other On-chip Memory
Besides the 520 kB main memory, there are two other dedicated RAM blocks that may be used in some circumstances:
• Cache lines can be individually pinned within the XIP address space for use as SRAM, up to the total cache size of
16 kB (see Section 4.4.1.3). Unpinned cache lines remain available for transparent caching of XIP accesses.
• If USB is not used, the USB data DPRAM can be used as a 4 kB memory starting at 0x50100000.
_
Code:
0x20082000 0x1000015D 0x10000113 0x10000115 0x10000111 0x10000111 0x10000111 0x10000111_
Those are just logical mirrors of the same physical SRAMs.Alternative SRAM Regions:
Tested alternative SRAM regions specified in documentation as non-striped (e.g., 0x20080000), but results were consistently zeros.
Statistics: Posted by gmx — Mon Mar 31, 2025 3:22 pm