Interleaved memory is a design that spreads memory addresses across multiple memory banks to compensate for the relatively slow speed of DRAM. It increases bandwidth and improves performance by allowing different modules to be accessed independently and in parallel by different processing units like a CPU and hard disk. There are two address formats for interleaved memory: low order interleaving which spreads addresses across banks, and high order interleaving which uses high order bits as the module address.

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Presented by
Vaishali Goyal
Ashish Goyal
Interleaved Memory

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Basic Concept…
It is a design made to compensate for the relatively slow speed of dynamic random-access memory (DRAM) or core memory, by
spreading memory addresses evenly across memory banks.

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Advantages
Increases Bandwidth
Improves
performance

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Two address formats for Memory
Interleaving the address space:
• Low Order Interleaving
• High Order Interleaving

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Low Order Interleaving

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High Order Interleaving
• High Order Interleaving uses the high order bits as the
module address and the lower bits as the
word address within each module.
• In this arrangement, the consecutive words are usually
in one module, having multiple modules is
not helpful if consecutive words are needed.

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Modules can be accessed independently
by different units, e.g. by the CPU and a
Hard Disk (or a second CPU) AND the
units use different Modules
=> Parallel operation => Higher Performance

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Thank You