SD Card SPI Interface module

Standard micro-SD card breakout modules for microcontrollers operate on <mark>4.5V to 5.5V DC</mark> and communicate via a standard SPI interface.

Technical Specifications

• Operating Voltage: 4.5V – 5.5V (includes an on-board 3.3V voltage regulator)
• Logic Level Compatibility: 3.3V and 5V (uses an on-board level shifter circuit)
• Supported Card Types: Micro SD (up to 2GB) and Micro SDHC (up to 32GB)
• Communication Interface: SPI (Serial Peripheral Interface — MISO, MOSI, SCK, CS)
• File Systems: FAT16 or FAT32
• Current Consumption: 0.2 mA to 200 mA (typically under 100 mA during active read/write)
• Dimensions: Approximately 42 mm x 24 mm x 12 mm

Pinout Configuration

• GND: Ground connection
• VCC: Power supply (4.5V – 5.5V)
• MISO: Master In Slave Out (SPI data output)
• MOSI: Master Out Slave In (SPI data input)
• SCK: Serial Clock (SPI timing signal)
• CS: Chip Select (Slave select pin)