Analog Devices ADSP-21479 EZ-Board, Руководство пользователя

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ADSP-21479 EZ-Board Evaluation System Manual 1-15
Using The ADSP-21479 EZ-Board
For more information on changing the reset values, refer to the online
help.
An example program is included in the EZ-Board installation directory to
demonstrate how to setup and access the SDRAM interface.
For more information on how to initialize the registers after a reset, search
the online help for “reset values”.
SRAM Interface
The board has a 1M x 16-bit flash memory connected to the processor’s
asynchronous memory interface (AMI). The SRAM can be accessed via
the asynchronous memory select 3 pin. It allows access to 16 bits of data
and interfaces to address line 0 through 19 of the processor.
An example program is included in the EZ-Board installation directory to
demonstrate how to setup and access the SRAM interface. For more infor-
mation on how to initialize the registers after a reset, search the online
help for “reset values”.
Parallel Flash Memory Interface
The parallel flash memory interface of the ADSP-21479 EZ-Board con-
tains a 4 MB (4M x 8 bits) Numonyx M29W320EB chip. Flash memory
is connected to the 8-bit data bus and address lines 0 through 21. Chip
enable is decoded by the
MS1
select line (default) through switch
SW13
position 2. See “External Port Enable Switch (SW13)” on page 2-12 . The
address range for flash memory is
0x0400 0000
to
0x043F FFFF
.
Flash memory is pre-loaded with boot code for the power-on-self test
(POST) program. For more information, refer to
“Power-On-Self Test”
on page 1-27 .