Flash Memory
Automatic configuration of SDRAM is not optimized for any SCLK fre-
quency. Table 1-3 shows optimized configuration for the SDRAM
registers using a 125 MHz and 133 MHz SCLK . Only the EBIU_SDRRC reg-
ister needs to be modified in the user code to achieve maximum
performance.
Table 1-3. SDRAM Optimum Settings
Register
EBIU_SDGCTL
EBIU_SDBCTL
EBIU_SDRRC
SCLK = 133 MHz
(CCLK = 400 MHz)
0x0091 998D
0x0000 0025
0x0000 0408
SCLK = 125 MHz
(CCLK = 500 MHz)
0x0091 998D
0x0000 0025
0x0000 03A0
An example program is included in the EZ-KIT Lite installation directory
to demonstrate the SDRAM memory setup.
Flash Memory
The flash memory interface of the ADSP-BF538F EZ-KIT Lite can con-
nect to an external 4 MB (2M x 16-bits) ST Micro M29W320EB device
or the 1 MB internal flash memory. The size and connections of flash
mem ory are controlled by the flash address range switch ( SW6 ) and the flash
chip enable (FCE) switch ( SW14 ). See “Flash Enable Switch (SW6)” on
page 2-11 and “FCE Enable Switch (SW14)” on page 2-12 .
The default for the SW6 switch is all positions ON , which allows the user to
have access to the full 4 MB of the external flash memory. The default for
the SW14 switch is all positions OFF , which allows the user to have access to
the full 4 MB of the external flash memory. Each ~AMS signal accounts for
1 MB of flash memory. The amount of available flash memory decreases
as ~AMS signals are turned OFF .
1-10
ADSP-BF538F EZ-KIT Lite Evaluation System Manual
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ADZS-BF561-EZLITE BOARD EVAL ADSP-BF561
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