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User’s Manual
33
4.5 Memory
4.5.1 SRAM
RCM3750 modules have 512K of SRAM.
4.5.2 Flash EPROM
RCM3750 modules also have 512K of flash EPROM.
NOTE:
Rabbit Semiconuctor recommends that any customer applications should not be
constrained by the sector size of the flash EPROM since it may be necessary to change
the sector size in the future.
Writing to arbitrary flash memory addresses at run time is also discouraged. Instead, use a
portion of the “user block” area to store persistent data. The functions
writeUser-
Block
and
readUserBlock
are provided for this. Refer to the
Rabbit 3000 Micropro-
cessor Designer’s Handbook
for additional information.
A Flash Memory Bank Select jumper configuration option based on 0
Ω
surface-mounted
resistors exists at header JP1 on the RCM3750 modules. This option is reserved for future
use.
4.5.3 Serial Flash
A 1Mbyte serial flash is available to store data and Web pages. Sample programs in the
SAMPLES\RCM3700
folder illustrate the use of the serial flash.
4.5.4 Dynamic C BIOS Source Files
The Dynamic C BIOS source files handle different standard RAM and flash EPROM sizes
automatically.
Summary of Contents for RabbitCore
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