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EDO/FPM
Legacy Memory |
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PM (Fast Page Mode) and EDO (Extended Data Out) technologies are older technologies
popular in the late 1980's and early 1990's. These technologies should not
be used for new designs, but STEC can still provide many modules using these
technologies for older designs that may still be in production. Or, they can
also be used for replacement parts for customer's systems that have been installed
in the field.
- Available in 32, 36, 64, and 72 Bit Bus Widths
- Operating Voltage of 3.3 and 5.0 Volts
- Long Life Support
- Capacities from 16MB to 1GB
- Fast Page Mode (FPM) and Extended Data Out (EDO) Architectures
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STEC offers end-of-life and legacy modules to support older, previous generation
products.
Many OEMs who have designed in what is now legacy or end-of-life memory technology
are faced with a difficult challenge. How to support memory module replacements
and upgrades for their end products, as the memory components needed to build
the modules are being phased out are increasingly hard to find.
Even though these end products are no longer in production or are older generation
products, they still require these legacy memory module technologies to maximize
their performance and to function. Many systems still use older versions of
memory technology such as FPM and EDO architectures for which STEC has an
extensive library of readily available designs.
STEC will work with you to forecast and to plan for your long-term needs
for these difficult to obtain products. Additionally, STEC's engineers and
sales professionals look forward to working with you to design new memory
technology into both existing and new product designs.
| FPM (FAST PAGE MODE) MEMORY MODULES |
A page is described as the section of memory available within a row address.
Within one specific row are several columns of memory bits. With Fast Page Mode
(FPM) Memory Modules, you need only specify the row address once for accesses
within the same page addresses. Successive accesses to the same page of memory
only require a column address to be selected, which saves time in accessing
the memory. JEDEC, the electronic standards agency, has specified standards
for the FPM DRAM.
| EDO (EXTENDED DATA OUT) MEMORY MODULES |
Extended Data Out DRAMs work very similar to FPM DRAMs. EDO DRAMs have
the ability to work within a page like FPM DRAMs. The primary advantage
with EDO DRAMs over FPM DRAMs is that EDO DRAMs hold the data valid even
after the signal that "strobes" the column address goes inactive.
This allows faster microprocessors to manage time more efficiently, performing
many tasks without having to attend to slower memory. That is, while
the EDO DRAM is retrieving an instruction for the microprocessor, the
microprocessor can perform other tasks without worrying that the data
will become invalid. JEDEC has specified standards for the EDO DRAM.
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