What is Static RAM vs. Dynamic RAM? Is there any difference between them?

Static RAM relies on bistable triggers to memorize information; Dynamic RAM relies on the gate capacitance in the MOS circuit to memorize information. Since the charge on the capacitor leaks and needs to be replenished at regular intervals, the dynamic RAM needs to be set up with a refresh circuit. However, dynamic RAM has a higher integration and lower power consumption than static RAM, so the cost is also low, and it is suitable for large-capacity memory.

Therefore, the main memory usually uses dynamic RAM, while the cache uses static RAM. In addition, memory is also used in graphics cards, sound cards, CMOS and other devices to act as a device cache or to save fixed programs and data.

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Differences: Dynamic RAM is periodically refreshed, while static RAM is not refreshed.

1. Static RAM, referring to SRAM: as long as there is power supply, the data it saves will not be lost, and it is a high-speed memory, such as the cache in the CPU

2. Dynamic RAM, referring to DRAM: there is power supply, and it must be based on the refresh time parameters required by it to keep the stored data from being lost, such as the memory module in the computer.

Expansion:

1. Static random access memory (SRAM) is a type of random access memory. The so-called "static" fiber pin means that as long as the memory is kept energized, the data stored in it can be kept constantly. In contrast, the data stored in dynamic random access memory needs to be updated periodically.

However, when the power** stops, the data stored by SRAM disappears.

2. DRAM, or Dynamic Random Access Memory, is the most common system memory. DRAM can only hold data for a short period of time. In order to retain data, DRAM uses capacitive storage, so it must be refreshed every once in a while, and if the storage cell is not refreshed, the stored information will be lost.

Encyclopedia dram

Dynamic RAM is characterized by the need to refresh after each readout.

1. The centralized normal read and write operation is carried out separately from the refresh operation, and the refresh is completed centrally, and there is a period of time to stop the read and write operation.

2. The decentralized storage system cycle is divided into two time slices, and the normal read/write operations and refresh operations are carried out at different times, and there is no time to stop the read and write operations, but the system running speed is reduced.

3. Asynchronous refresh every once in a while to ensure that the entire memory is refreshed within the refresh cycle.

1. Static RAM uses a trigger as a storage unit to store 1 and 0, the access speed is fast, and the content can be kept unchanged as long as the power is not off.

2. Compared with dynamic RAM, the integration of static RAM is lower, and the static RAM does not need to consider the refresh circuit set up to keep the data, so the expansion circuit is simpler.

3. Since static RAM is to keep the data in the memory through the active circuit, it consumes more power and is also higher.

The characteristics of static RAM are:1Fast speed; 2.**High; 3.The circuit is relatively simple.

Static RAM is stored as a memory unit with a trigger wide pei 1 and 0, which has a fast access speed and can keep the content unchanged as long as it does not lose power. Generally, static RAM has a low level of integration and high cost. The basic memory circuit of static RAM is a flip-flop, each flip-flop stores a bit of binary information, a storage unit composed of a plurality of flip-flops, a memory matrix composed of a plurality of memory cells, and an address decoder and a read-write control circuit form static RAM.

Compared with the dynamic RAM, the static RAM does not need to consider the refresh circuit set up to maintain the data, so the expansion circuit is simpler. However, since static RAM is an active circuit that holds data in memory, it consumes more power and ** is also higher.