What is RAM? (Random Access Memory)
hello and welcome to PcSoftware. what does random access mean within the computer circuit memory world? it means the planet a minimum of to us nerds and during this short article. we will explain RAM step through this memory tree and point you at specific articles that cover different memory types will also show you the relative cost of these different memories.
first, you’ll jump around within the memory space using addresses. you’ll write new data over here at the address 1 million and 24. then, you’ll send a new address command and immediately read. what is down here at address 288? you’ll also pick any starting address then read or write sequentially from that time stop. when you want and jump to a unique spot and fuck again the second trait of random access is that writing new data into a specific address is done just as quickly as reading the information from that address in other words from the microprocessor or microcontrollers perspective the timing to erase. and overwrite is the same because the timing to just read the information at any address. we call this trait symmetrical read and write in NAND and nor flash memories ie prompts which aren’t random access memories the physics of erasing and writing over the last. content can take lots of time often much for much longer than the read time for that very same address this gets us to our memory treat. this first branch is random access notice that NAND flash nor flash an EEPROM aren’t random access memories in the worst case these technologies erase write times are thousands to tens of thousands times longer.
They’re read times this second branch here is non-volatile. memories don’t lose data when the power goes away SRAM and DRAM the lower-cost lose all content when the ability is lost. so they’re called volatile memories speaking of cost. this chart takes an endeavor at a cost per bit but only to indicate. you ways the prices relate to every other NAND flash is cheapest out and away DRAM and nor flash have similar costs per bit at their best relative density points then SRAM and then EE prom and at the best price points on this chart are the non-volatile Ram products a design engineers goal is to use the bottom cost memory solution. that meets their need and only use these costlier memories when the appliance must have that function generally speaking NAND flash holds large content pictures large databases nor flash holds boot code DRAM holds large working files like Word and Excel SRAM holds the microcontrollers functioning data and non-volatile Ram. they hold small data logs and steppe journals things like that no product remains within the market unless. it’s valued so of these products, types bring value here are some topic related articles each your about 5 minutes. we’ve made them explain these technologies and these values please note that microchip doesn’t sell off these memory types as standalone ICS so our articles are only offered to assist educate and find you started just type in what’s f RAM or M RAM or whatever looks helpful then look for articles with the microchip logo our hope is that these tools will facilitate your quickly learn specifics about various memory technologies terms and other memory concepts.