Adafruit SPI Flash SD Card – XTSD

This breakout is for a fascinating chip – it looks like an SPI Flash storage chip (like the GD25Q16) but it’s 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. For example, you can use the built-in SD library in Arduino, or for CircuitPython we have an SD card library. The breakout will act just like a 4 GB-sized card with FAT formatting (it’s pre-formatted).

You might be wondering why you’d want such a thing – after all you can’t plug it into a computer to get the files off like MicroSD cards. For some use cases, such as data logging in a high-vibration device where you don’t want the SD card to come loose, or when you need to reduce the size, or when the microcontroller provides a USB mass storage interface, this chip could be very useful.

Compared to plain SPI flash, this NAND memory chip handles all the wear levelling and ECC calculation. You don’t have to manually erase blocks; you just write and read them like you would with any SD card. You can clock it up to 50 MHz, and the ‘write speed class’ is 8 (although you may not be able to get that fast with plain 1-bit SPI compared to SDIO).

We made this breakout to be a quick start for this chip. We wired the chip in ‘SPI’ mode with a level shifter, so you can use it with 3V or 5V logic easily. You also get a 3.3V regulator and a pullup on CS. Wire up the SPI pins to your microcontroller, use your favourite SD library, and you’ll be ready to rock in minutes!

The board comes in three sizes

• 512MB
• 2GB
• 4GB

Note: Please select which size board you want before adding it to the cart

Specifications

• Capacity: 4Gbit (512MByte) / 16Gbit (2GByte) / 32Gbit (4 GByte)
• Operation Conditions Temperature Range: Ta = -30 to +85°C / -25 to +85°C / -25 to +85°C
• Storage Conditions Temperature Range: Tstg = -40 to +85°C / -40 to +150°C / -40 to +150°C
• Supports up to 50Mhz clock frequency
• Built-in HW ECC Engine and highly reliable NAND management mechanism
• Write speed up to class 8
• Dimensions: 21.5mm x 17.7mm x 2.9mm
• Weight: 1.5g