SKU: TH2100
This Adafruit XTSD SPI Flash SD Card breakout board features a unique SD card implemented in an SMT chip format, offering the convenience of standard SD storage without a removable card. Although it looks like an SPI Flash chip, it behaves exactly like a 4 GB FAT-formatted SD card and works seamlessly with existing SD libraries in Arduino and CircuitPython.
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This Adafruit XTSD SPI Flash SD Card breakout board features a unique SD card implemented in an SMT chip format, offering the convenience of standard SD storage without a removable card. Although it looks like an SPI Flash chip, it behaves exactly like a 4 GB FAT-formatted SD card and works seamlessly with existing SD libraries in Arduino and CircuitPython.
Ideal for compact or high-vibration designs, this solution eliminates loose connectors while providing built-in wear leveling and ECC handled internally by the chip. The breakout is preconfigured for SPI mode and includes a 3.3 V regulator, level shifting for 3 V or 5 V logic, and a CS pull-up, making it quick to wire and easy to integrate into data logging, embedded storage, or USB mass-storage projects.
Technical details for Adafruit XTSD SPI Flash SD Card - 4GB.
| Specification | Details |
|---|---|
| Storage Capacity | 32 Gbit (4 GB) |
| Operating Temperature | -25°C to +85°C |
| Storage Temperature | -40°C to +150°C |
| Maximum Clock Frequency | Up to 50 MHz |
| Error Correction | Built-in hardware ECC engine |
| NAND Management | Integrated wear leveling and reliability management |
| Write Speed Class | SD Speed Class 8 |
| Pin | Description |
|---|---|
| VIN | 3–5 V power input. Use the same voltage as your MCU logic level (typically 5 V for Arduino). |
| 3V3 | Regulated 3.3 V output from onboard LDO (up to 100 mA available). |
| GND | Common ground for power and logic. |
| SCK | SPI clock input. |
| MISO | SPI data output from SD chip to microcontroller. |
| MOSI | SPI data input from microcontroller to SD chip. |
| CS | Chip Select (active low). Pull low to start an SPI transaction. |
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