static RAM - definizione. Che cos'è static RAM
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Cosa (chi) è static RAM - definizione

SEMICONDUCTOR MEMORY THAT USES FLIP-FLOPS TO STORE EACH BIT
Static RAM; S-RAM; Static Random Access Memory; SRAM latency; RSNM; Read static noise margin; Static random access memory; Static storage; ESRAM; 6T SRAM; 6T SRAM cell; 6T RAM cell
  • A static RAM chip from a [[Nintendo Entertainment System]] clone (2K × 8 bits)
  • Four-transistor SRAM provides advantages in density at the cost of manufacturing complexity. The resistors must have small dimensions and large values.
  • A six-transistor CMOS SRAM cell. WL: word line. BL: bit line.
  • die]] of a STM32F103VGT6 [[microcontroller]] as seen by a [[scanning electron microscope]]. Manufactured by [[STMicroelectronics]] using a 180-[[nanometre]] process. Topology of the cells is clearly visible.

static RAM         
static random-access memory         
<storage> (SRAM) Random-access memory in which each bit of storage is a bistable flip-flop, commonly consisting of cross-coupled inverters. It is called "static" because it will retain a value as long as power is supplied, unlike dynamic random-access memory (DRAM) which must be regularly refreshed. It is however, still volatile, i.e. it will lose its contents when the power is switched off, in contrast to ROM. SRAM is usually faster than DRAM but since each bit requires several transistors (about six) you can get less bits of SRAM in the same area. It usually costs more per bit than DRAM and so is used for the most speed-critical parts of a computer (e.g. cache memory) or other circuit. (1995-04-22)
static analysis         
SIMPLIFIED ANALYSIS WHEREIN THE EFFECT OF AN IMMEDIATE CHANGE TO A SYSTEM IS CALCULATED WITHOUT REGARD TO THE LONGER-TERM RESPONSE OF THE SYSTEM TO THAT CHANGE
Static scoring; Static projection; Static Analysis
<theory, programming> A family of techniques of program analysis where the program is not actually executed (as opposed to dynamic analysis), but is analyzed by tools to produce useful information. Static analysis techniques range from the most mundane (statistics on the density of comments, for instance) to the more complex, semantics-based techniques. Qualities sought in static analysis techniques are soundness and completeness. (2003-04-12)

Wikipedia

Static random-access memory

Static random-access memory (static RAM or SRAM) is a type of random-access memory (RAM) that uses latching circuitry (flip-flop) to store each bit. SRAM is volatile memory; data is lost when power is removed.

The term static differentiates SRAM from DRAM (dynamic random-access memory) — SRAM will hold its data permanently in the presence of power, while data in DRAM decays in seconds and thus must be periodically refreshed. SRAM is faster than DRAM but it is more expensive in terms of silicon area and cost; it is typically used for the cache and internal registers of a CPU while DRAM is used for a computer's main memory.