Micro SD SPI or SDIO Card Breakout Board - 3V ONLY!
MicroSD card breakout supporting SPI or SDIO, 3 V logic only. Level shift before pairing with a 5 V host. Used for image, audio, and sensor-log storage on microcontrollers.
MicroSD card breakout supporting SPI or SDIO, 3 V logic only. Level shift before pairing with a 5 V host. Used for image, audio, and sensor-log storage on microcontrollers.
3.3 V power input for the microSD card breakout; Adafruit warns that 5 V or VBAT will damage the card.
Common ground for power and logic.
Card-detect signal; connected to GND internally when no card is inserted and pulled up to 3V through 4.7 kΩ when a card is inserted.
SPI clock input to the SD card.
SPI serial data out from the SD card to the microcontroller.
SPI serial data input from the microcontroller to the SD card.
SPI chip-select input; pull low to start an SPI transaction.
SDIO bidirectional command/information signal between microcontroller and SD card.
SDIO bidirectional data line; Adafruit identifies the silkscreen legend as D0.
SDIO bidirectional data line; Adafruit identifies the silkscreen legend as D1.
SDIO bidirectional data line; Adafruit identifies the silkscreen legend as DAT2.
SDIO bidirectional data line; Adafruit identifies the silkscreen legend as D3.
| Pin | Type | Function | Voltage |
|---|---|---|---|
| 3V | Power | 3.3 V power input for the microSD card breakout; Adafruit warns that 5 V or VBAT will damage the card. | 3.3V only |
| GND | Ground | Common ground for power and logic. | 0V |
| DET | GPIO | Card-detect signal; connected to GND internally when no card is inserted and pulled up to 3V through 4.7 kΩ when a card is inserted. | 3V logic |
| CLKSCK | SPI | SPI clock input to the SD card. | 3V logic |
| SOMISO | SPI | SPI serial data out from the SD card to the microcontroller. | 3V logic |
| SIMOSI | SPI | SPI serial data input from the microcontroller to the SD card. | 3V logic only |
| CS | SPI | SPI chip-select input; pull low to start an SPI transaction. | 3V logic only |
| CMD | GPIO | SDIO bidirectional command/information signal between microcontroller and SD card. | 3V logic |
| D0 | GPIO | SDIO bidirectional data line; Adafruit identifies the silkscreen legend as D0. | 3V logic |
| D1 | GPIO | SDIO bidirectional data line; Adafruit identifies the silkscreen legend as D1. | 3V logic |
| DAT2 | GPIO | SDIO bidirectional data line; Adafruit identifies the silkscreen legend as DAT2. | 3V logic |
| D3 | GPIO | SDIO bidirectional data line; Adafruit identifies the silkscreen legend as D3. | 3V logic |
3.3 V power input for the microSD card breakout; Adafruit warns that 5 V or VBAT will damage the card.
Common ground for power and logic.
Card-detect signal; connected to GND internally when no card is inserted and pulled up to 3V through 4.7 kΩ when a card is inserted.
SPI clock input to the SD card.
SPI serial data out from the SD card to the microcontroller.
SPI serial data input from the microcontroller to the SD card.
SPI chip-select input; pull low to start an SPI transaction.
SDIO bidirectional command/information signal between microcontroller and SD card.
SDIO bidirectional data line; Adafruit identifies the silkscreen legend as D0.
SDIO bidirectional data line; Adafruit identifies the silkscreen legend as D1.
SDIO bidirectional data line; Adafruit identifies the silkscreen legend as DAT2.
SDIO bidirectional data line; Adafruit identifies the silkscreen legend as D3.
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