VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

Blackfin Processor Booting
ADSP-BF535 Processor On-Chip Boot ROM
The on-chip boot ROM for the ADSP-BF535 processor does the following
(Figure 2-1).
Figure 2-1. ADSP-BF535 Processors: On-Chip Boot ROM
1. Sets up supervisor mode by exiting the RESET interrupt service routine
and jumping into the lowest priority interrupt (IVG15).
2. Checks whether the RESET is a software reset and if so, whether to
skip the entire boot sequence and jump to the start of L2 memory
(0xF000 0000) for execution. The on-chip boot ROM does this by
checking bit 4 of the system reset configuration register (SYSCR). If
bit 4 is not set, the on-chip boot ROM performs the full boot
sequence. If bit 4 is set, the on-chip boot ROM bypasses the full
boot sequence and jumps to 0xF000 0000. The register settings are
shown in Figure 2-2.
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