Interleaved memory
Encyclopedia
Interleaved memory is a technique for compensating the relatively slow speed
of DRAM
. The CPU can access alternative sections immediately without waiting for memory to be cache
d. Multiple memory bank
s take turns supplying data
.
An interleaved memory with "n" banks is said to be n-way interleaved. If there are "n" banks, memory location "i" would reside in bank number i mod n.
One way of allocating virtual addresses to memory modules is to divide the memory space into contiguous blocks. The CPU can access alternate sections immediately, without waiting for memory to catch up (through wait states). Interleaved memory is one technique for compensating for the relatively slow speed of dynamic RAM (DRAM). Other techniques include page-mode memory and memory caches.
Interleaved memories are the implementation of the concept of accessing more words in a single memory access cycle. This can be achieved by partitioning the memory e.g. into N separate memory modules. Thus, N accesses can be carried out to the memory simultaneously.
Speed
In kinematics, the speed of an object is the magnitude of its velocity ; it is thus a scalar quantity. The average speed of an object in an interval of time is the distance traveled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as...
of DRAM
Dram
Dram or DRAM may refer to:As a unit of measure:* Dram , an imperial unit of mass and volume* Armenian dram, a monetary unit* Dirham, a unit of currency in several Arab nationsOther uses:...
. The CPU can access alternative sections immediately without waiting for memory to be cache
Cache
In computer engineering, a cache is a component that transparently stores data so that future requests for that data can be served faster. The data that is stored within a cache might be values that have been computed earlier or duplicates of original values that are stored elsewhere...
d. Multiple memory bank
Memory Bank
A memory bank is a logical unit of storage in electronics, which is hardware dependent. In computer the memory bank may be determined by the memory access controller and the CPU along with physical organization of the hardware memory slots....
s take turns supplying data
Data
The term data refers to qualitative or quantitative attributes of a variable or set of variables. Data are typically the results of measurements and can be the basis of graphs, images, or observations of a set of variables. Data are often viewed as the lowest level of abstraction from which...
.
An interleaved memory with "n" banks is said to be n-way interleaved. If there are "n" banks, memory location "i" would reside in bank number i mod n.
One way of allocating virtual addresses to memory modules is to divide the memory space into contiguous blocks. The CPU can access alternate sections immediately, without waiting for memory to catch up (through wait states). Interleaved memory is one technique for compensating for the relatively slow speed of dynamic RAM (DRAM). Other techniques include page-mode memory and memory caches.
Interleaved memories are the implementation of the concept of accessing more words in a single memory access cycle. This can be achieved by partitioning the memory e.g. into N separate memory modules. Thus, N accesses can be carried out to the memory simultaneously.