Analog Devices Blackfin ADSP-BF537 Hardware Reference Manual page 1037

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0x5C 0x00 0x00 0x00

INIT CODE DXE COUNT

Figure 19-24. SPI Slave Mode Boot Sequence: Boot Block 1 of INIT

After the full INIT code DXE is booted into Blackfin memory, the slave

SPI Blackfin processor then asserts the feedback strobe,

to the host not to send any more bytes during INIT code execution. Since

the Blackfin processor core is running much faster than the SPI interface,

the INIT code executes at a much faster rate compared to the rate at

which bytes are sent from the host. See

0x00 0x00 0xA0 0xFF

10-BYTE HEADER FOR BLOCK 2 of INIT CODE DXE

*ASSERTION OF FEEDBACK STROBE (PG13) DURING SHORT DURATION OF INIT CODE

Figure 19-25. SPI Slave Mode Boot Sequence: Boot Block 2 of INIT

ADSP-BF537 Blackfin Processor Hardware Reference

10-BYTE HEADER FOR BLOCK 1 of INIT CODE DXE

0x02 0x00 0x00 0x00

System Reset and Booting

0x46 0x00 0x00 0x00

OF INIT CODE

, to indicate

0x40 0x80 0xA0 0xFF

10-BYTE HEADER

DXE1 COUNT BLOCK