What is a Flash Memory Card Reader?
A flash memory card reader is a device which usually plugs into a USB slot on a PC or laptop. Its purpose is to permit reading or writing of a flash memory card by the PC. Many modern laptops now feature a built-in SD card reader for this purpose.
How Much Flash Memory Do I Need?
Several influencing factors will determine the decision about how much flash memory is needed for a particular device or task. This could include aspects such as price and capacity, yet there are many different models and types available to choose from.
One of the principal factors is the device where the flash memory will be added. This is because the device itself will likely have constraints on features such as maximum size, which will then impact the decision surrounding which flash memory chip is best suited.
What is Flash Memory Made of?
Flash memory consists of a grid with a pair of transistors, the control gate and floating gate, at each intersection. This is then separated with an oxide layer acting to insulate the floating gate.
Who Invented Flash Memory?
Flash memory was invented in the 1980s by an engineer named Masuoka Fujio in partnership with leading brand Toshiba. Fujio and his team named the technology “flash memory”, a name which is still used today, as they likened the speedy erasure of data on a flash memory device to the flash of a camera.
The technology was created with the aim to enable data to be stored even when the device was disconnected from a separate source of power. It was hoped flash memory would be able to supersede existing data storage technologies which included DRAM chips, floppy disks, and magnetic tape at the time. Flash memory has gone from strength to strength ever since, and today, it is one of the most popular storage solutions for a range of applications, industries, and domestic goods.
What is SPI Flash Memory?
Serial Peripheral Interface (SPI) is an interface bus which is typically used for sending data between a microcontroller and a peripheral device such as an SD card. It operates using separate data and clock lines plus a select line which enables the user to choose which device it communicates with and how it interfaces.
Therefore, SPI flash memory is a type of flash module which is interfaced to over SPI. It is a relatively inexpensive and accessible option, yet still provides moderate levels of speed. There are various types and capacities of SPI flash memory.
How Long Can Flash Memory Store Data?
Although this will depend on the conditions of use, most modern flash memory is designed to store data for an average of ten years. This provides a reliable system for storing data over the mid-term, but it should be noted that flash memory is not designed to be a long-term storage solution. For this reason, it is recommended that data be backed up on a secondary device or storage system.