external memory bus

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• External Memory Interface — an External Memory Interface is a bus protocol for communication from an integrated circuit, such as a microprocessor, to an external memory device located on a circuit board. The memory is referred to as external because it is not contained… …   Wikipedia

• Memory address — A digital computer s memory, more specifically main memory, consists of many memory locations, each having a memory address, a number, analogous to a street address, at which computer programs store (except when the address is in mask ROM) and… …   Wikipedia

• Memory bandwidth — is the rate at which data can be read from or stored into a semiconductor memory by a processor. Memory bandwidth is usually expressed in units of bytes/second, though this can vary for systems with natural data sizes that are not a multiple of… …   Wikipedia

• Bus (computing) — 4 PCI Express bus card slots (from top to bottom: x4, x16, x1 and x16), compared to a 32 bit conventional PCI bus card slot (very bottom) In computer architecture, a bus is a subsystem that transfers data between components inside a computer, or… …   Wikipedia

• Memory controller — The memory controller is a digital circuit which manages the flow of data going to and from the main memory. It can be a separate chip or integrated into another chip, such as on the die of a microprocessor. This is also called a Memory Chip… …   Wikipedia

• Bus sniffing — or Bus snooping is a technique used in distributed shared memory systems and multiprocessors to achieve cache coherence. Although there is one main memory, there are several caches (one per processor), and unless preventative steps are taken, the …   Wikipedia

• Memory type range register — Memory type range registers (MTRRs) are a set of processor supplementary capabilities control registers that provide system software with control of how accesses to memory ranges by the CPU are cached. It uses a set of programmable model specific …   Wikipedia

• Memory protection — is a way to control memory access rights on a computer, and is a part of most modern operating systems. The main purpose of memory protection is to prevent a process from accessing memory that has not been allocated to it. This prevents a bug… …   Wikipedia

• Memory Type Range Registers — (MTRRs) are control registers that provide system software with control of how accesses to memory ranges by the CPU are cached. It uses a set of programmable model specific registers (MSRs) which are special registers provided by most modern CPUs …   Wikipedia

• Bus encryption — is the use of encrypted program instructions on a data bus in a computer that includes a secure cryptoprocessor for executing the encrypted instructions. Bus encryption is used primarily in electronic systems that require high security, such as… …   Wikipedia

• Memory management unit — This 68451 MMU could be used with the Motorola 68010 A memory management unit (MMU), sometimes called paged memory management unit (PMMU), is a computer hardware component responsible for handling accesses to memory requested by the CPU. Its… …   Wikipedia