Analog Devices Blackfin ADSP-BF537 Hardware Reference Manual page 1036

Specific Blackfin Boot Modes
location 0xFFA0 4300 with these values: 0x11, 0x22, 0x33, 0x44, 0x55,
0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF, and
0x19.
After the SPI slave receives the first 10-byte header from the host, it knows
which flag to configure as the
PG
used. Note the deassertion of
word are processed.
FLAG
SPICLK all
SPISS all
0 0
MOSI all
MISO all
PFLAG all
0x40
Figure 19-23. SPI Slave Mode Boot Sequence: Start of Boot Sequence
After that, the host sends out the 4-byte INIT code DXE count block, the
10-byte header for block 1 of the INIT code DXE, and then block 1 itself.
See Figure 19-24.
19-50
HWAIT
HWAIT
1
0 0
0x80 0xA0 0xFF
ADDRESS
10-BYTE HEADER FOR INIT CODE DXE COUNT BLOCK
ADSP-BF537 Blackfin Processor Hardware Reference
feedback strobe. In this case,
in Figure 19-23 after bits 8–5 of the
0
0 0
1
1
0x04 0x00 0x00
COUNT
is
PG0
0
0x00 0xB2 0x01
FLAG