Use Cases: Flash memory is used in a variety of devices, including USB drives, memory cards, SSDs (Solid State Drives), embedded systems, smartphones, tablets, and more. EEPROM. EEPROM is a type of data memory device that uses an electronic device to erase or write digital data. It has per-byte erase-and-write capabilities, which makes it slow.

The USB Flash Drive referred in this manual contains USB Flash Drive, USB HD, USB Flash Memory, USB reader and so on. The SD card referred in this manual contains SD, MMC card, HC-SD card (with high capacity), TF card and so on. The manual mainly supplies commands of file manage control, uses to USB Flash Drive and SD card. An SD card comes up by default in 1-bit SD mode, but can be changed into 4-bit mode after startup. If necessary, the card can also be switched into SPI mode, which is always 1-bit wide. The bus width in SD mode can be anywhere from 1 to 4-bits (see 6.2.1). There isn't any 8-bit SD mode, because there aren't enough pins on the SD card to support it.

UFS has a command Queue (CQ) to sort out commands to be carried out and allowing multiple commands to be carried out. eMMC is half-duplex hence either read or write into the memory is possible. UFS is a full-duplex interface and allows simultaneous read and write. eMMC is slower than UFS . UFS supports advanced features like Deep Sleep, write

If the SD card is formatted and a fixed length file is created (copy a blank file from the PC - IIRC there are 32MB files I created in the ZiCog thread). ZiCog locates the file under FAT16 and takes that address as the base and you access the file relatively (directly) from there. Originally heater used the SD card directly with no FAT16.
Overview. This breakout is for a fascinating chip - it looks like an SPI Flash storage chip (like the GD25Q16) but its really an SD card, in an SMT chip format. What that means is that you wire up like an SD card breakout, and use the SD card libraries you already have for your microcontroller. If you have a project with any audio, video, graphics, data logging, etc in it, you'll find that having a removable storage option is essential. Most microcontrollers have extremely limited built-in storage. For example, even the Arduino Mega chip (the Atmega2560) has a mere 4Kbytes of EEPROM storage. There's more flash (256K) but you cant write to it as easily and you have to be careful if
EEPROM vs SD Flash. I am working on a Arduino program (a game, a slot machine) that needs to store 16 bitmaps (the slot machine symbols) that are 32 * 16 bytes each (total 8192 bytes). The bitmaps are static/immutable so does not need to be changed. The only requirement is that they need to be accessed fast. Thus performance prevails capacity.
gP0N.
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    • spi flash vs sd card