VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

Blackfin Processor Booting
Figure 2-25 shows the logical interconnection between the UART host
and the Blackfin device as required for booting. The figure does not show
physical line drivers and level shifters that are typically required to meet
the individual UART-compatible standards. Figure 2-26 and Figure 2-27
provide more information about UART booting.
Figure 2-26. UART Slave Booting
Figure 2-27. UART Init and Zero Fill Blocks
2-32 VisualDSP++ 4.5 Loader and Utilities Manual