12/31/2023 0 Comments Interface memory procssorFor example, a laptop may have 8 GB of RAM while having 250 GB of storage. In general, a computer will have more storage space than memory. How much space is available in memory and storage differs as well. A running program may be in a computer's primary memory when in use - for fast retrieval of information - but when that program is closed, it resides in secondary memory or storage. Storage is nonvolatile, meaning the information is still there after the computer is turned off and then back on. An example of storage is a hard drive or a hard disk drive ( HDD). The term storage refers to secondary memory and is where data in a computer is kept. The data is only stored for a short time because primary memory is volatile, meaning it isn't retained when the computer is turned off. It enables users to access data that is stored for a short time. Memory is also where information is processed. Memory is most often referred to as the primary storage on a computer, such as RAM. Memory refers to the location of short-term data, while storage refers to the location of data stored on a long-term basis. Put succinctly, memory is primary memory, while storage is secondary memory. The concept of memory and storage can be easily conflated as the same concept however, there are some distinct and important differences. This image shows how primary, secondary and cache memory relate to each other in terms of size and speed. In general, the more memory (primary memory) a computing device has, the less frequently the computer must access instructions and data from slower (secondary) forms of storage. If a computer's central processer ( CPU) had to only use a secondary storage device, computers would become much slower. This type of memory is located on microchips that are physically close to a computer's microprocessor. The term memory is used as a synonym for primary memory or as an abbreviation for a specific type of primary memory called random access memory ( RAM). There are technically two types of computer memory: primary and secondary. Memory is also used by a computer's operating system, hardware and software. Memory is one of the basic functions of a computer, because without it, a computer would not be able to function properly. It's where information is stored for immediate use. Memory is the electronic holding place for the instructions and data a computer needs to reach quickly. It is getting the Command and Address Parity error flag during training. Memory Reference Voltage for Command and AddressĪlert: This signal is used at command training only. There is one Chip Select for each SDRAM rank.Ĭommand Address: These signals are used to provide the multiplexed command and address to the SDRAM. These signals are used to select particular SDRAM components during the active state. The crossing of the positive edge and the negative edge of their complement are used to sample the command and control signals on the SDRAM.Ĭhip Select: (1 per rank). SDRAM Differential Clock: Differential clocks signal pairs, pair per rank. The data is captured at the crossing point of DQS during reading and write transactions.Įxample: DDR0_DQSP0 refers to DQSP of DDR channel 0, Byte 0. Data Buses: Data signals interface to the SDRAM data buses.Įxample: DDR0_DQ2 refers to DDR channel 0, Byte 2, Bit 5.ĭata Strobes: Differential data strobe pairs.
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