Adsp-Bf535 Processor Second-Stage Loader - Analog Devices VisualDSP++ 3.5 Manual

Blackfin Processor Booting

ADSP-BF535 Processor Second-Stage Loader

The only situation where a second-stage loader is unnecessary is when the
application code contains only one section starting at the beginning of L2
memory (
0xF000 0000
A second-stage loader must be used in applications in which multiple seg-
ments reside in L2 memory or in L1 memory and/or SDRAM. In
addition, a second-stage loader must be used to change the wait states or
hold time cycles for a Flash/PROM booting or to change the baud rate for
a SPI boot (see
mation on these features).
When a second-stage loader is used for booting, the following sequence
takes place.
1. Upon
RESET
second-stage loader) from external memory to address
in L2 memory
ADSP-BF535 Processor
0xEF00 0000
On-Chip
Boot ROM
Figure 2-4. ADSP-BF535 Processors: Booting With Second-Stage Loader
2-6
).
"Command-Line Switches" on page 2-42
, the on-chip boot ROM downloads
(Figure 2-4).
L2 Memory
(0xF000 0000)
2 nd Stage Loader
2 nd Stage Loader
or
Application
Code
for more infor-
bytes (the
N
4-Byte Header (N) 0x0
2 nd Stage Loader
N
Bytes
Application
Code/Data
PROM/Flash or SPI Device
VisualDSP++ Loader Manual
for 16-Bit Processors
0xF000 0000