|ROM API functions / Boot ROM|
The boot block is 8 kB in size. The boot block is located in the memory region starting from the address 0x1FFF 0000. The bootloader is designed to run from this memory area, but both the ISP and IAP software use parts of the on-chip RAM. The RAM usage is described in ISP-IAP API Memory and interrupt use for ISP and IAP. The interrupt vectors residing in the boot block of the on-chip flash memory also become active after reset, i.e., the bottom 512 bytes of the boot block are also visible in the memory region starting from the address 0x0000 0000.
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