The Adafruit SPI FLASH Breakout features a W25Q128 chip providing 128 Mbit (16 MByte) of non-volatile flash storage over a standard SPI interface. It's ideal for adding compact, low-power external storage to microcontroller projects — perfect for files, images, fonts, and audio clips when a full SD card is more than you need.

Unlike QSPI breakouts, this board includes level shifting so it works safely with both 3.3V and 5V logic, plus a 3.3V regulator and a pull-up on chip select. The chip comes blank and can be addressed as flat memory or formatted with a filesystem like LittleFS or FAT.

Key Features

• W25Q128 Flash Chip – 128 Mbit (16 MByte) non-volatile SPI flash storage
• SPI Interface – Single-channel SPI with level shifting for 3V or 5V logic
• 3.3V Regulator – Onboard regulator and CS pull-up for clean operation
• Blank Chip – Address as flat memory or format with LittleFS/FAT
• Breadboard-Friendly – Includes header for breadboard use

Ideal For

• Data logging and sensor storage
• Storing images, fonts, and audio clips
• Adding external memory to older 5V microcontrollers
• Projects that need more than EEPROM but less than an SD card

Package Contents

• 1× SPI FLASH breakout board (W25Q128)
• 1× Header strip

Resources

• Adafruit SPIFlash Arduino Library